Olefin
n. 石蜡, 烯烃\\n[化] 烯烃
🗣️ 情景例句
I need a new toothbrush. My old one's worn out.
我需要一支新牙刷。旧的用坏了。
How much do you charge for sending a cable transfer to London?
发一张到伦敦的电汇，要收费多少？
He made his way through the forest.
他设法穿过了森林。