球沟道 Ball Track
钢球沟道 Ball race groove ; Ball track
琉球海沟 Ryukyu Trench
深沟球轴承 [机] deep groove ball bearing ; Deep Groove Ball Bearings ; Deep Groove ; NTN
半球沟 hemispheric sulcus
带沟球轴承 groove ball bearing
琉球沟弧盆系 ryukyu trench arc basin system
东海及琉球沟弧盆系 East China Sea and Ryukyu Trench Arc Back-Arc
洗沟球 Gutter Ball
我打出了一个洗沟球。
奥巴马打了个落沟球,以37分的总分结束了比赛。
He bowled a gutter ball and ended the game with the score of 37.
同时还表明,增加生物球的投加数量可以增加悬浮生长的活性污泥与附着生长的生物膜的协同作用,从而增强植物-生物膜氧化沟对污染物的去除效率。
In this paper, effect of the amounts of biology-ball was studied on the wastewater purification in the Plant-biofilm Oxidation Ditch(PBFOD)by home-made biology-ball putted in the system.
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