Cocl
[医] 阴极断电阵挛
🗣️ 情景例句
I haven't dated any one else since her mother died.
自从她母亲去世之后 我从没有和别人约会过。
You look more rested than I've seen you before.
你比上次我看到你的时候精神多了。
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。