Sourcebook
n. 原始资料(集),资料读物
🗣️ 情景例句
have been busy at work this morning
一早上都在忙着
When the police arrived, I was doing the housework.
当警察来的时候，我在做家务。
Hello, Zhou Lan. Can I ask you for some advice?
你好，周兰。我想征求一下你的建议，可以吗？