Persulphates
(persulphate 的复数) n.[化]过(二)硫酸盐
🗣️ 情景例句
the kids in the ward
住院的孩子们
She's not at her desk right now.
这会儿她不在办公室办公。
When he went outside half an hour later, he was astonished to find the little black lamb was almost white.
半小时后，当他从屋里出来时，他惊奇地发现小黑羔羊全身几乎都变成白色。