污水处理环保净水设备，可清除池底的杂质、残留物小树叶等 ... 流量 Flow rate 清理效率 CleaningEfficiency 吸口宽度 Suction width ...
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可以用这段时间给接下来的故事编写测试规范，做一些分析，或者做一些一直想要做的清理工作，让以后的工作更有效率。
Using the time to write more test specs for upcoming stories, doing a little analysis, or cleaning up something that you've been meaning to do would be better.
甚至还有规模经济：“一次清理10个咖啡杯，比一次清理一个、去10次要有效率得多。”
There are even economies of scale: “One trip to clean 10 coffee cups is much more efficient that 10 trips to clean one.”
这些受访者当中很少有人会愿意拿出他们的养老金用在提高阿拉斯加海岸线清理工作的效率上。
Few of these respondents would be willing to hand over their pensions for a more efficient cleanup of the Alaskan shoreline.
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