Dialkene
二烯烃
🗣️ 情景例句
I see. We'll take a good look at you.
我明白了。我们会好好替你看看。
This dress is made of silk,isn't it?
这件衣服用丝绸做的，是吗？
No, I think it's his cup.
不，我想那是他的杯子。