Most people I meet have some English ability, but the ones who work hard at it really stand out from the crowd.
我遇到的多数人都会点英语,但只有那些刻苦学习的人才鹤立鸡群,给我深刻印象。
and we control it by means of the mud which we circulate down the drill pipe.
我们让泥浆顺着钻杆向下循环,用这种方法来控制压力。