Caproamide
[机] 己酸酐
🗣️ 情景例句
Are you here on business or for pleasure?
你来这儿是出差还是游玩？
When three know it, all know it.
三人知，天下晓。
Nearly all the sports practised nowadays are competitive.
现在开展的体育运动几乎都是竞争性的。