Theres nothing really wrong with this function, but its a bit inefficient to call it every time you need to use this information.
用这个函数没有真正的错误，但是每次你需要使用这个信息都调用它是有点效率低的。
Theres nothing really wrong with this function, but its a bit inefficient to call it every time you need to use this information.
用这个函数没有真正的错误，但是每次你需要使用这个信息都调用它是有点效率低的。
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