Persulphates
(persulphate 的复数) n.[化]过(二)硫酸盐
🗣️ 情景例句
Ellen, why don't you go out to the backyard
Ellen，何不去院子
Not at all.
当然可以。（当然不介意）
On the first lap, Class 3 were in front.
在跑第一圈时，3班在前边。