Ethylethylene
丁烯-1
🗣️ 情景例句
So, why don't you call him in the morning?
那么你为何不明天早上打个电话给他？
Experience keeps no school, she teaches her pupils singly.
亲身经验，才是经验。
We'd have to compare notes on what we've discussed during the day.
我们想用点时间来研究讨论一下白天谈判的情况。