若重新打开以前关闭的方法，则会清除以前为该方法定义的任何符号。

Reopening a method that was previously closed erases any previously defined symbols for that method.

youdao

若重新打开以前关闭的方法，则会清除以前为该方法定义的任何符号。

Reopening a method that was previously closed erases any previously defined symbols for that method.

youdao