離實用還很遠。意義在於新的機械能和電能轉換方式可能造出有用的副產品。

來源: xwu622 於 2014-08-03 10:00:10 [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.