Citrullus
西瓜属
🗣️ 情景例句
This is not the way to spend our fifth anniversary.
这不是我们过五周年纪念日的方式。
Of two evils choose the least.
权衡两害，取其轻者。
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。