顾客抱怨是一种满意程度低的最常见的表达方式，但没有抱怨并不一定表明顾客很满意。
Customer complaints are a common indicator of low customer satisfaction but their absence does not necessarily imply high customer satisfaction.
但一个特别令人悲哀的抱怨却是：从来没有时间去阅读。
But one specific complaint is made especially mournfully: there's never any time to read.
他们都抱怨石头挡在路中央，但没有人试图移动它。
All of them complained about the stone in the center of the road, but nobody tried to move it.
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