Heptene
[化] 庚烯
🗣️ 情景例句
My health sucks.
我的身体很差。
I would like to place a person-to-person call.
我要打一个叫人电话。
This is a major achievement because, in relative terms, planets are very small and old not emit light.
这是一个重要的成就，因为相对来说，行星很小，而且也不发光。