Perchromate
n. [化]过铬酸盐
🗣️ 情景例句
Mr. Stewart …
Stewart先生……
I did homework lat night.
我昨晚做家庭作业。
He had spotted a tiny bottle at the bottom of my case and he pounced on it with delight.
他在我的箱底发现了一只小瓶，高兴地一把抓了起来。