Nonamethylene
[化] 1,9-亚壬基
🗣️ 情景例句
Sorry, I don't quite understand why...
对不起，我不太理解为什么…
And good luck to this wonderful new branch.
我祝愿这家新分行好运。
I didn't know he was the richest person in the world.
我不知道他是世界上最有钱的人。