Tannide
鞣酸酐
🗣️ 情景例句
He is still unable to express himself in English.
他仍然不能用英语表达自己的意思。
I ought to explain to the manager.
我应该向经理解释。
Zheng Jie, I would like to support your music school.
郑杰，我愿意资助你办音乐学校。