Underreamer
扩孔器
🗣️ 情景例句
Don't stand on ceremony, make yourself at home.
别客气，随便吃。
I had never seen a grown man break down and cry.
我从未曾看到过一个这么强壮的汉子痛哭失声。
Did you find your ticket, sir?
你找到你的票了吗，先生？