Persulphates
(persulphate 的复数) n.[化]过(二)硫酸盐
🗣️ 情景例句
I'm trying to catch Mary, please.
我想与Mary联络。
What's your nationality?Are you a Chinese?
你的国籍是什么？你是中国人?
The other students in the class keep their eyes closed.
班里其余学生一直闭着眼。