例如航天發射，那時幾年發一顆衛星，現在幾個星期發一顆。現在一個城市的鋼產量比那時全國的鋼產量還多

來源: nnndayd 於 2022-02-07 13:21:07 [舊帖] [給我悄悄話] 本文已被閱讀：次

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