Propellants
出国 Abroadn. 推进剂; 推进物( propellant的复数形式 )
🗣️ 情景例句
I've never been more serious.
我从来没有比现在更认真了。
I'm sorry, but I didn't understand your question. Could you please restate it?
对不起，你的问题我没有理解，请你再说一遍好吗？
This is a good photograph.Who are these people?
这是一张很好的照片。这些人是谁。