Bok
abbr. 韩国银行（The Bank of Korea）；知识体系（Body Of Knowledge）
🗣️ 情景例句
I think it's about time we got going.
我想差不多是告辞的时候了。
The young man had been well aware of her presence at the party.
那个年轻人早已注意到她在宴会上。
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。