Tetrahydrobenzene
四氢化苯, 环已烯
🗣️ 情景例句
A man can develop his mind by reading.
读书增进个人的智慧。
I'm glad to hear about your graduation.
我很高兴得知你毕业了。
But in an old man who has known human joys and sorrows,
可是老年人已经饱尝了人间的甘苦，