Aerochemistry
航空化学
🗣️ 情景例句
I don't know why I didn't think of it.
我不知道为什么我没有想到这一点。
I'm glad to meet you.
幸会。高兴见到你。
Most of the parents will not be able to pay much money.
多数家长是付不起很多钱的。