🗣️ 情景例句
Yes? Can I do something for you?
什么事？我能为您效劳吗？
How long is the ticket valid?
这车票有效期多久？
In the 1970s, computers were common enough, but only in big business, government departments, and large organizations.
在70年代，计算机已经相当普及了，但只用在大公司，政府部门和大的组织之中，