比重提高，說明美國繼續領先或者擴大領先地位。但是，即使沒有一戰和二戰，美國多半照樣獨步天下。

來源: 矽穀居士於 2023-11-01 10:12:55 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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