Ethene
n. 乙烯\\n[化] 乙烯; 1,2-亞乙基
??? 情景例句
What kind of payment terms can you offer?
您要什么樣的付款方式？
The outsideer sees the best (or most) of the game.
旁觀者清。
How long have you been here?
你在這里多久了？