Heptacene
[化] 并七苯
🗣️ 情景例句
That's quite true, but on the other hand, we have to think of our priorities.
那很有道理，但我们还必须分清轻重缓急。
You should have your suit cleaned and ironed.
你应该把你的套装拿去洗烫一下。
I'm just calling to introduce myself. My name is Tang.
我打电话是向您作自我介绍，我姓唐。