Acrylaldehyde
丙烯醛
🗣️ 情景例句
I don't know for sure.
我不太清楚。
Once is no custom.
一次不成例。
By comparison, ferry trips or cruises offer a great variety of civilized comforts.
相比之下，坐船旅行或环游可以得到文明世界的各种享受。