Perchlormethylformate
[医] 双光气, 聚光气(毒气之一种)
🗣️ 情景例句
in almost a full week.
差不多有一整个星期了。
How did you doing spend your holiday?
你假期怎么过的？
I think I failed the French paper.
我想我的法语及不了格，我能回答