有没有一种方法可以从字符串中删除重复的单词，而不是在没有重复的单词时进行裁剪？

def remove_duplicate_words(sentence):
    words = sentence.split()  # 拆分字符串为单词数组
    unique_words = set()  # 创建空的哈希集合

    result = ""
    for word in words:
        if word not in unique_words:  # 检查单词是否已经存在
            result += word + " "  # 添加单词到结果字符串
            unique_words.add(word)  # 添加单词到哈希集合

    return result.strip()  # 去除结果字符串末尾的空格

# 示例用法
sentence = "this is a test test sentence"
result = remove_duplicate_words(sentence)
print(result)  # 输出: "this is a test sentence"