Halfword
半字
🗣️ 情景例句
Please tell me about it right way.
请立即告诉我是什么。
A scientist has come up with a good idea. That's it!
科学家想起了一个好创意。就是这个！
and we have to lower into the ground and haul out of the ground great lengths of drill pipe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.
我们必须把很长的钻杆一节节地钻入地下，然后再从地下拉出来。钻杆顶部安装的发动机带动钻杆旋转，它的底部装有钻头。