Bak
[计] 后备
🗣️ 情景例句
Are you worried?
你担心吗
I think you probably know China has adopted a flexible policy in her foreign trade.
我想你也许已经了解到中国在对外贸易中采取了灵活的政策。
Will you please try to find out for me what time the train arrives?
能不能请你帮我查查火车什么时候到？