Pentafluorization
五氟化反应
🗣️ 情景例句
What happened?
发生了什么事？
Telling your troubles is swelling your troubles.
诉说烦恼等于增加烦恼。
The French authorities had the plane packaged and moved in parts back to France.
法国政府让人把飞机包装起来，一部分一部分地搬回法国。