Cycloheptane
[医] 环庚烷
🗣️ 情景例句
I hope they aren't lost.
但愿没丢才好。
He's a teather.
他是教师。
Mr Hu stood at the starting line. All the runners got ready to run.
胡先生站在起跑线上。所有的运动员都做好了起跑准备。