Pentanitrol
四硝基季戊四醇
??? 情景例句
We cannot leave this problem unattended.
這一問題我們不能置之不理。
I can't express myself very well in English.
我不能很好地用英語表達自己。
What about vegetables, Sir? They usually go bad as soon as we are at sea.
那些蔬菜怎么辦呢，先生？通常是剛一出海它們就會壞掉的。