例如航天发射，那时几年发一颗卫星，现在几个星期发一颗。现在一个城市的钢产量比那时全国的钢产量还多

来源: nnndayd 于 2022-02-07 13:21:07 [旧帖] [给我悄悄话] 本文已被阅读：次

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