Allenes
二烯烃
🗣️ 情景例句
That's right. What should we do when we find a shortage in the shipment?
这很对。要是我们发现货物短缺，该怎么办？
Appearances are deceitful.
人不可貌相，海水不可斗量。
There are mice in Mrs. Lee's kitchen!
李太太的厨房里有老鼠！