水坝和水库当然需要不断的维修和精心保养，但常常是由于缺乏必要的管理制度而导致这些水利设施没有得到必要的维护。
Dams and reservoirs certainly need constant repairs and careful maintenance and do not always get them, usually because the necessary institutions are not in place.
缺乏保养会导致严重的问题发生，这样花在维修上的钱就比花在定期维护上的钱要多得多了。
Lack of maintenance inevitably leads to something big breaking and that will cost you a lot more to repair than it would have cost to make small, ongoing investments in regular maintenance.
设备的维护、保养、维修等服务。
Equipment maintenance, maintenance, repair and other services.
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