Underreamed
扩孔的
🗣️ 情景例句
Hello, who's speaking, please?
喂， 谁在讲话？
We're driving faster than you.
我们驾驶的比你快。
It has to be tall because it is like a giant block and tackle,
井架必须很高，因为它像一个巨型滑轮组。