U.s.p.
[医] 美国药典
🗣️ 情景例句
How are you?
你怎么样？
To deliver the mail
投递邮件
The conditions of society are such that skills have to be paid for in the same way that goods are paid for at a shop.
社会上的情况就是如此，技术是必须付钱去买的，就像在商店里要花钱买商品一样。