這個都是一個積累經驗的過程，無法求全責備。。。天朝是這樣，米國也是這樣。。。事到臨頭總會進步。。。

來源: 古代的事物於 2020-02-05 14:29:05 [舊帖] [給我悄悄話] 本文已被閱讀：次

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