Ofs
abbr. offices 办公室，办事处; one-function sketch 单功能草图
🗣️ 情景例句
Practice tenses as much as possible.
操练各种时态。
If I'm careful...
当心啊……
In this way, he has begun his own private 'telephone' service.
就这样，他开始自己的私人“电话”业务。