做了半天做出来了， x = 20 degrees. 确实挺难的，害得我浪费半天时间。

来源: SabrinaD 于 2022-08-02 19:32:20 [旧帖] [给我悄悄话] 本文已被阅读：次

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做了半天做出来了， x = 20 degrees. 确实挺难的， 害得我浪费半天时间。