Rorqual
n. [动]一种鲸鱼(尤指长须鲸)
✅ 同义词
🗣️ 情景例句
It's a serious matter for a lot of us.
对我们许多人来说这可是个严重的问题。
It's up to us to help those in need.
我们有责任帮助那些有困难的人。
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。