Catechutannic acid
[医] 儿茶鞣酸
🧩 词语组成解析
🗣️ 情景例句
and to read along with the children--their children.
和孩子们--他们的孩子们， 一起阅读。
I'm sorry to have kept you waiting.
很抱歉，让你久等了。[分词作状语]
Have you had any breakfast yet?
你吃过早餐了吗？