Mandatories
n. 受托管理国( mandatory的名词复数 )
🗣️ 情景例句
OK.
好。
When did you arrive?
你什么时候到达?
When you have finished your experiment, please tidy the lab and put everything back in the cupboards.
做完实验后，请你们把实验室整理好，并把所有的东西放回器皿柜。