Rugar
[医]硫酸钡，沉淀硫酸钡[造影剂]
🗣️ 情景例句
She's a smart young lady, and very nice.
她是个聪明的年轻姑娘 而且很善良。
Proverbs are the cream of a nation's thought.
谚语是一国的思想精华。
They were in fashion last year and the year before last.But they're not in fashion this year.
这鞋在去年和前年时兴，而今年已不流行了。