使人疲惫的不是远方的高山，而是鞋里的一粒沙子。
Tired of the mountain is not far away, but a grain of sand in my shoes.
⊙、使人疲惫的不是远方的高山，而是鞋子里的一粒沙子。
Make the person tired not far away mountains, but a grain of sand in your shoe.
显然，预期之外的噪音比预期到的更容易使人疲惫，只是这种疲惫要过一会才能在人的身上体现出来。
Apparently, unpredictable noise produces more fatigue than predictable noise, but it takes a while for this fatigue to take its toll on performance.
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