When he saw the land ahead, the swimmer redoubled his speed.
那个游泳者看见前面有陆地时，大大地加快了他的速度。
The saw cutting power and the circle line speed of saw web are also discussed.
还对锯机设计中主要性能参数驱动功率和锯片圆周线速度问题进行了较深入的讨论。
The saw cutting power and the circle line speed of saw web are also discussed.
还对锯机设计中主要性能参数驱动功率和锯片圆周线速度问题进行了较深入的讨论。
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