Olefination
烯化作用, 成烯作用
🗣️ 情景例句
the other night when I was trying on my new clothes.
也就是我试新衣服的那天晚上。
My handkerchif is grey.
我的手帕是灰色的。
For a long time.I watched them scurrying around the base of the tree in bewilderment.
在很长一段时间里，我看见蚂蚁围着大树底部来回转悠，不知所措。