H2
[醫] 氘(音刀), 重氫
??? 情景例句
Well, we always talk about
說的也是， 我們常在談論
Great talkers are not great doers.
其人說得多，做得不會多。
This may sound fantastic, but it is easily calculated.
這點聽起來令人難以置信，但卻很容易計算出來。