先進300年。美國不搞高鐵的，除非人口密集之後。

來源: mapell22 於 2015-06-07 10:08:05 [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.