Heptad
n. 七个, 成七的一组, 七价原子\\n[化] 七价物; 七价的
🗣️ 情景例句
I'm disappointed, but I respect your decision.
我很失望， 但我尊重你的决定。
It's an honor to be speaking to you today.
今天跟你们说话至感荣幸。
Somebody is always complaining to others.
有人总是向别人抱怨。