Underreamer
扩孔器
🗣️ 情景例句
The rural workforce has been flowing in to the cities ever since the open door policy was adopted.
自从改革开放政策实施以来，农付劳动力正不断流向城市。
One chick keeps a hen busy.
一只小鸡已够母鸡辛忙。
Oh, yes, it is.
哦，对，是我的杯子。