On a four-speed box the bearings are under load 25% of the time.
四档变速箱的轴承有25%的时间受载。
The black balls next to the box denote speed of the ship.
盒子旁边的黑球表示船速。
Fan gear mainly by the box, planetary gear speed change mechanism, and so on.
风机的变速箱主要由箱体、行星轮系和变速机构等构成。
Because of exceeding the speed limit, my father was taken to the police box.
因为超速驾驶，爸爸被带到警察亭。
Because of exceeding the speed limit, my father was taken to the police box.
因为超速驾驶，爸爸被带到警察亭。
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