Perchromate
n. [化]过铬酸盐
🗣️ 情景例句
Are you traveling alone or whth a friend?
你是一个人旅行还是结伴旅游？
The post office is two blocks straight ahead, You can't miss it.
那邮局一直向前走过两条街，很好找。
There is a journalist and writer living in America whose name is Alex Haley.
有一位住在美国的记者兼作家，名叫亚历克斯·哈利。