您可以看到,该方法将字符串转换为大写字母。
As you can see that method converted the string to uppercase.
返回一个字符串,该字符串中的所有字母都被转换为大写字母。
Returns a string where all alphabetic characters have been converted to uppercase.
返回一个字符串,该字符串中的所有字母都被转换为大写字母。
Returns a string where all alphabetic characters have been converted to uppercase.
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