blocks|key|898380|text|来自Widipedia：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|898381|学习曲线是指学习量与学习时间之间的图形关系。|blockquote|898382|术语“陡峭的学习曲线”(陡峭的学习曲线)通常是错误地使用了，用于那些需要花些时间让人头脑清醒的事物。同样在堆栈溢出上，我看到它错误地使用了很多次，因此这个问题和我自己对它的回答。|offset|length|style|BOLD|898383|实际上给出了一条陡峭的学习曲线，当它相对容易地以一种新的技能/技术/.开始时|898384|这意味着“学习进度(y)”与“投入时间(x)”之间的关系大于1。|898385|entityMap^0|0|0|N|6|0|0|Z|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$]]|$1|E|3|F|5|6|7|S|8|@$G|T|H|U|I|J]]|9|@]|A|$]]|$1|K|3|L|5|6|7|V|8|@$G|W|H|X|I|J]]|9|@]|A|$]]|$1|M|3|N|5|6|7|Y|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|P|$]]

from Widipedia:

<blockquote>
 The term learning curve refers to the
 graphical relation between the amount
 of learning and the time it takes to
 learn.
</blockquote>

The term "steep learning curve" is often wrongly used for things which need some time to wrap ones mind around. Also here on Stack Overflow I've seen it used wrongly many times and hence this Question and my own answer to it.

In fact a steep learning curve is given, when it is relatively easy to start of with a new skill/technique/...

it means that the relationship between "learning progress (y)" and "time invested (x)" is greater than 1.

blocks|key|898411|text|见维基百科。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|898412|“陡峭的学习曲线”是一个没有任何实际意义的时髦短语。它曾经意味着你会取得快速的进展。随着时间的推移，人们出现了一种误解，即“陡峭的”学习曲线意味着需要付出很大的努力来学习.|898413|结论:使用这个短语的人不知道不清楚。你应该从他们那里了解到一些具体的事情是很难学的，并且要克服那些口头禅和陈词滥调。|898414|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Learning_curve^0|1|4|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

See <a href="http://en.wikipedia.org/wiki/Learning_curve" rel="noreferrer">wikipedia</a>.

"steep learning curve" is a buzz-phrase that doesn't have any actual meaning. It used to mean that you'd make quick progress. "Over time, the misapprehension has emerged that a "steep" learning curve means that something requires a great deal of effort to learn..."

Conclusion: people who use the phrase don't know that it's unclear. You should get details from them on what specific things are hard to learn and get past the buzz-phrases and platitudes.

blocks|key|272928|text|对“学习曲线”有几种可能的解释，但相当自然的解释是X轴上的“时间流逝”和Y轴上的“获得的知识”。在这种映射中，一条陡峭的曲线意味着你能快速地获得大量的知识。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|272929|我唯一能想到的解释“陡峭”和“硬”的地方是，在X轴上映射“获得的知识”，在Y轴上映射“付出的努力”，这不是一个很自然的映射。|272930|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

There are a few possible interpretation of "learning curve", but a fairly natural one would be "time elapsed" on the X axis and "knowledge gained" on the Y axis. A steep curve, in that mapping, would imply that you gain a lot of knowledge, fast.

The only interpretation I can think of where "steep" is the same as "hard" is where you map "knowledge gained" on the X axis and "effort expended" on the Y axis and that is not a very natural mapping.

blocks|key|1271599|text|这是一场直觉之战。一方面，你有"steep=hard+to爬升“的联想，另一方面你有”时间在水平轴上“的惯例(但”水平轴上的熟练程度“不是”错误“，只是”不那么受欢迎“)。所以，IMHO不是“对”还是“错”的问题，而是“直觉”和“更直观”的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1271600|我认为“爬上去的steep=hard”会赢，因为它吸引了生活中任何时候爬过楼梯的人，而不是有时连受过数学训练的人都混在一起的x-y曲线。|1271601|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

It's a battle of intuitiveness. On one hand, you've got "steep=hard to climb" association, on the other hand you have "time on the horizontal axis" convention (but "proficiency on the horizontal axis" isn't "wrong", just "less popular"). So, IMHO it's not a matter of "right" vs "wrong" but rather "intuitive" vs "more intuitive".

I think that "steep=hard to climb" will win, because it appeals to anyone who at any point in their life has climbed a stair, as opposed to the x-y curve which even people trained in mathematics sometimes mix up.

blocks|key|898449|text|我一般认为，这与分配给学习的时间有关，也与你在这段时间里必须学到的东西有关。如果你只有很短的时间去学习一些东西，你的学习曲线将比你有更长的时间去学习同样数量的材料，你的学习曲线会更加陡峭。因此，一个陡峭的学习曲线是困难的，因为它意味着你试图把六个月的学习时间塞进三个星期，或者别的什么。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|898450|在相同的时间内，更多的材料会产生同样的曲线。|898451|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I've generally understood it to have more to do with the amount of time allotted to learning, and what you have to learn in that period of time. If you have only a short amount of time in which to learn something, your learning curve is going to be much steeper than if you had a longer amount of time to learn the same amount of material. So a steep learning curve IS difficult because it means you're trying to cram six months worth of learning into three weeks, or whatever.

More material in the same amount of time would produce the same curve.

blocks|key|902943|text|诚然，“陡峭的学习曲线”应的意思是“容易”，因为学习曲线的起源是一个随时间变化的衡量成绩的图表，而对难学任务的恰当表达应该是“渐进学习曲线”。但是，“陡峭的学习曲线”应该意味着“艰难”，这是非常自然的，因为：(+a)大多数人从来没有看过实际的学习曲线，b)“陡峭”意味着“困难”，而“渐进”意味着“容易”。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|902944|这就是语言的演变过程，现在试图改变这个词的一般用法是完全徒劳的。而且，无论如何，--我对整个问题不太关心(看看您是如何确切地知道我的意思的？)|902945|entityMap^0|3|I|0|14|C|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|P|8|@]|D|@]|E|$]]]|I|$]]

It's true that "steep learning curve" should mean "easy" given the origin of the learning curve as a graph of measured performance as a function of time, and that the proper expression for a hard-to-learn-task should be "gradual learning curve". But it's perfectly natural that "steep learning curve" should have come to mean "hard" given that a) most people have never looked at an actual learning curve, and b) "steep" implies "difficult" whereas "gradual" implies "easy".

This is how languages evolve, and it would be utterly futile to try and change the general usage of this term now. And, in any event, I could care less about the whole issue (see how you still knew exactly what I meant?).

blocks|key|1271682|text|困难程度不是一个因素。学习曲线描述了获得一套熟练技能或高水平理解的时间长度。描述将根据适用于该曲线的测试主题而有所不同。虽然可以肯定地说，获得像MS记事本这样的应用程序的能力的学习曲线将是陡峭的，但曲线的另一个应用程序将是个体测试对象获得这种能力所需的时间长度。获得MS记事本熟练程度的学习曲线通常是陡峭的，但玛丽的学习曲线可能比约翰更陡峭。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1271683|我认为关键是首先了解曲线的应用范围。|1271684|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Level of difficulty is not a factor. A learning curve depicts the length of time to acquire a proficient skill set or high level of comprehension. The description will vary based on the test subject that the curve is applied to. While one can certainly say that the learning curve for acquiring proficiency of an application such as MS Notepad would be steep, another application for the curve would be the length of time individual test subject take to acquire such proficiency. The learning curve for acquiring proficiency of MS Notepad is generally steep, but it may be steeper for Mary than it is for John. 

I think the key is to first understand what the curve is being applied to

blocks|key|273086|text|“学习曲线”最初有在X轴上制造/学习的总时间或总累积单位，以及在y轴上产生/学习单个单元所需的时间。你的第一单元总是比第100或第1000单元花费更多的时间。曲线的“陡度”取决于你在生产/学习一件东西上的速度。学得快，你就会有一条“陡峭”的曲线；慢慢地，你就会有一条平坦的曲线。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|273087|我同意不知情的人已经改变了这个词的原意，但是准确地说陡峭是很容易的。人们之所以不高兴，是因为我们中那些在学校里注意正确使用语言的人很少参与这种进化。|offset|length|style|BOLD|273088|entityMap^0|0|Q|7|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

A "learning curve" originally had total elapsed time [or total cumulative units manufactured/learned] on the X axis and the time required to produce/learn a single unit on the y axis. Your first unit always takes more time than the 100th or 1,000th. The "steepness" of the curve depends on how fast you get good at producing/learning a thing. Learn quickly and you have a "steep" curve; slowly and you have a flat curve. 

I agree that the uninformed have morphed the original meaning of the term, but to be accurate steep is easy. People get upset because those of us who paid attention to using language correctly in school rarely get to take part in this type of evolution.

<ul>
<li>What exactly is a learning curve?</li>
<li>And why is it wrong to use the term "steep learning curve" for something which has high entry barriers and takes quite some time to get into?</li>
</ul>

As to the why-ness of this question:

<ul>
<li>The terms are used often and inconsistently on Stack Overflow</li>
<li>I myself have been confused by it</li>
<li>Mostly the newbies are confronted with these terms when they for example ask questions like "what's the best php development framework"</li>
</ul>

What's a learning curve and why is steep not hard?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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学习曲线到底是什么？为什么要用“陡峭的学习曲线”这个词来形容那些进入壁垒很高，而且需要相当长时间才能进入的东西？至于这个问题的原因：这些术语在堆栈溢出时经常使用且不一致。我自己也被它弄糊涂了大多数新手在问诸如“什么是最好的php开发框架”这样的问题时都会遇到这些术语。

问什么是学习曲线，为什么陡峭而不困难？
EN

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问什么是学习曲线，为什么陡峭而不困难？EN