Trichromate
三铬酸盐
🗣️ 情景例句
That's right. Grandpa hangs it there for good luck.
是的。爷爷把它放在那儿 以求好运。
My parents got married in 1
我父母1954年结婚的。
Let me help you. Do it like this.
我来帮你，要这样做。