Underreamer
扩孔器
🗣️ 情景例句
Hello, Joanne. Nice to meet you.
好， Joanne。很高兴见到 。
This is Tom. He's my classmate.
这是汤姆。我的同学。
Settlers made agreements with Native American cheifs but always broke them afterwards.
殖民者同美洲土著人的首领达成了协议，但是这些协议随后总是被撕毁。