Spiro[4.4]nonane
[化] 螺[4.4]壬烷
🗣️ 情景例句
It was for a good reason.
你今天早走是有原因的。
If they say you are good, ask yourself if it be ture.
若有人称赞你，要自问对不对。
He goes home early everyday for fear that his wife would be angry.
他每天很早就回家，免得老婆生气。