Heptacontane
(正)七十(碳)烷
🗣️ 情景例句
We have both been excited about seeing you
我们两个很高兴见到
Thank you very much for giving us your valuable time.
我们占用了你宝贵的时间，非常感谢。
It's true that he may fall behind the other students.
真的，他可能会落在其他同学的后面。