Aithioic acid
[机] 二硫羧酸
🧩 词语组成解析
🗣️ 情景例句
A very good question.
一个非常好的问题。
You'll hurt yourself, if you don't take care.
你不专心的话，就会伤到你自己。
It has a span of 4,260 feet.
桥长4，260英尺。