Perfluoroallene
[化] 全氟丙二烯
🗣️ 情景例句
We are running a special offer on this holiday.
我们在这个假期有个特价优惠。
I put some photographs in the envelope.
我在信里夹了几张照片。
We're going out to the Summer Palace.
我们打算去颐和园看看。