Pentafluorination
五氟化反应
🗣️ 情景例句
You go first.
你先来。
Palm Springs. I've got a cousin there.
棕榈泉，我有个表兄在那儿。
At one point, it seemed certain that their plane would crash.
在有个地方，飞机似乎肯定要坠毁了。