想搞清楚，因为挺想儿子将来学工程，我用自己的经历做标准，怕用错reference，把娃坑了。

来源: tidytiger 于 2022-11-08 08:12:56 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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