问题描述：
英语成分you must call.l
you must override the OnOk member function and call DestroyWindow function from within it.为什么from within it而不是 from it 或者within it 连续两个介词可以这样用吗?
you must override the OnOk member function and call DestroyWindow function from within it.为什么from within it而不是 from it 或者within it 连续两个介词可以这样用吗?
问题解答：
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