以下为句子列表：
英文: Cancellation of mechanical seal, a solution to the headache of frequent servicing of other submerged pumps due to the easily worn-out mechanical seal, a saver of operational cost and a promoter of work efficiency.
中文: 取消了机械密封，解决了其他液下泵因机械密封容易磨损而须经常维修的烦恼，节约了泵的运行成本，提高了工作效率。
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英文: When the underground water is used, its energy-efficiency ratio can reach higher than 5, which will save 40～70％ operational cost compared with a common wind cooling combination.
中文: 采用地下水时，能效比达到5以上，比普通风冷机组节省运行费用40～70％。
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