Alkenes
(alkene 的复数) n.[化]烯烃,链烯
🗣️ 情景例句
Uh--hold it. Old Country Inn?
嗯 ，等一等。Old Country Inn？
There isn't much room for doubt in this matter.
关于这件事，不大有质疑余地。
Grandma is ill, she said. I must take her to hospital.
“奶奶病了，”她说，“我必须送她去医院。