Picadex
[化] 哌嗪荒酸; 哌嗪羧二硫代酸
🗣️ 情景例句
I'm a foreign student, and I'd like to make some new friends.
我是个外国学生， 我想交几个新朋友。
How did you decide that product was safe?
你怎样决定产品是安全的呢？
Your English is incredibble.
我真不敢相信你的英语。