Catechutannic acid
[医] 儿茶鞣酸
🧩 词语组成解析
🗣️ 情景例句
Oh no! It's five thirty.
哎呀 已经五点半了。
I'm afraid I have some rather bad news for you.
我恐怕有些很坏的消息要告诉你。
Portable boiling elements that can boil small quantities of water are useful when the right voltage of electricity is available.
如果有相配的电压，可以煮少量水的便携式热水装置是有用的。