The swimming pool isn't open today because they're making repairs.
游泳池今天不开门因为他们在搞修理。
They are making repairs to buy the telescope a few more years of life.
他们希望通过维修,望远镜的寿命可以再延续几年。
This method has certain instructive effect on the gear making repairs and supplying replacements.
此方法对齿轮修配具有一定的指导作用。
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