除了矽穀和醫藥等狹窄領域，美國近二十年各項技術發展非常差，

來源: 大洋bridge 於 2023-09-17 15:18:23 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.