Prb
abbr. principal borehole 主钻井
🗣️ 情景例句
He is behind the rest of the class in reading.
他在阅读方面不如班上的其他同学。
To pick your teeth
剔牙
They had to work inside the ship, cutting away old metal, fixing new metal plates, drilling holes, laying electrical and phone wires and fixing new pipes for water and steam.
他们要在船舱里工作，切掉旧的金属，焊接新的金属板，钻孔，埋电线和电话线以及安装新的水管和蒸汽管。