如何替换字符串的多个子字符串？

original_string = "Hello, world! This is a test."
replacements = [("Hello", "Hi"), ("world", "universe"), ("test", "example")]

for old, new in replacements:
    original_string = original_string.replace(old, new)

print(original_string)  # 输出: Hi, universe! This is a example.

let originalString = "Hello, world! This is a test.";
let replacements = {
    "Hello": "Hi",
    "world": "universe",
    "test": "example"
};

let resultString = originalString.replace(/Hello|world|test/g, match => replacements[match]);

console.log(resultString);  // 输出: Hi, universe! This is a example.

public class Main {
    public static void main(String[] args) {
        String originalString = "Hello, world! This is a test.";
        String[] searchList = {"Hello", "world", "test"};
        String[] replacementList = {"Hi", "universe", "example"};

        for (int i = 0; i < searchList.length; i++) {
            originalString = originalString.replaceAll(searchList[i], replacementList[i]);
        }

        System.out.println(originalString);  // 输出: Hi, universe! This is a example.
    }
}