Perchromic acid
[化] 过铬酸
🧩 词语组成解析
🗣️ 情景例句
I can't wait to take a bite of the pumpernickel.
我简直迫不及待想吃一口黑面包。
He irons sweaters every day.
他每天都烫衣服。
While he was eating, I asked him to lend me twenty pounds.
当他吃饭时，我提出向他借20英镑。