Perortho ester
[化] 过原酸酯
🧩 词语组成解析
n. 酯\\n[化] 酯
🗣️ 情景例句
Is it all right if I use a letter of credit?
如果我使用信用证，没关系吧？
It's about time!
正是时候。
Before long, biscuits of all shapes and sizes began arriving at the factory.
不久，形状各异，大小不一的饼干陆续送到工厂。