Perfluamine
全氟三丙烷
🗣️ 情景例句
But we'd like to find out
但我们想知道
You have to study English, don't you?
你必须学英语，不是吗？
This continental slope usually starts at a place somewhere near the 100-fathom mark
一般是从差不多100英寻水深的地方开始的，