Perfluoroalkanes
全氟烴類
??? 情景例句
No problem, sir. Someone will bring them to your room shortly.
沒問題，先生。有人會盡快給你送過去。
A good lawyer,an evil neighbour.
好律師不是好鄰居。
It immediately ran away when she saw it, and experts confirmed that a puma will not attack a human being unless it is cornered.
她剛看見它，它就立刻逃走了。專家證實，美洲獅非被逼得走投無路，是決不會傷人的。