Olefines
(olefine 的复数) [化] 烯烃; 链烯烃
🗣️ 情景例句
Fifty years? Wow!
五十年？ 喔！
Speak little of your ill luck and boast not of your good luck.
少说失意事，莫夸好运道。
Mr. Smith is in charge of this class.
史密斯老师负责该班。