Pentafluoroguanidine
五氟化胍
🗣️ 情景例句
It's next week from this Monday.
下个星期一。
I worked at the garage this morning.
我今早在车房工作。
First of all, they may have come to this planet of ours thousands or millions of years ago,
首先，他们可能在几千年前或几百年万年前已来过我们地球，