Heptacene
[化] 并七苯
🗣️ 情景例句
Any trouble with them?
有什么问题？
I will go to the sportsfield.
我将去运动场。
Cave exploration, or pot-holing, as it has come to be known, is a relatively new sport.
洞穴勘查——或洞穴勘探——是一项比较新的体育活动。