I.u.
[医] 免疫单位
🏥 医学释义
国际单位
🗣️ 情景例句
They are constantly quarreling.
他们时常吵架。
You are useless!
你真没用！
An enterprise has to incur certain costs and expenses in order to stay in business.
一个企业为了继续经营，不得不支出一定的费用和开销。