Perfluoroalkanes
全氟烃类
🗣️ 情景例句
No problem, sir. Someone will bring them to your room shortly.
没问题，先生。有人会尽快给你送过去。
A good lawyer,an evil neighbour.
好律师不是好邻居。
It immediately ran away when she saw it, and experts confirmed that a puma will not attack a human being unless it is cornered.
她刚看见它，它就立刻逃走了。专家证实，美洲狮非被逼得走投无路，是决不会伤人的。