Ethylsulfate
硫酸乙酯
🗣️ 情景例句
What for?
为什么？
A test pilot needs plenty of nerve.
飞行试飞员需要极大的勇气。
I spent the whole day in my room, but I did not write a single card!
我在房间里关了整整一天。然而竟连一张明信片也没写成！