Perfluoroethylene
[机] 四氟乙烯
🗣️ 情景例句
What I really want is the chance to learn some advanced methods of management.
我真正希望的是有机会学到一些先进的管理方法。
Don't bother me with stupid questions.
不要问一些愚蠢的问题来烦我。
I promise.
我保证。