One challenge that squirrels face, well many small mammals do, is that because of their size, sweating would make them lose too much moisture.
松鼠面临的一个挑战是，因为它们体型小，出汗会使它们失去太多水分，其他许多小型哺乳动物也面临着这样的问题。
But the sample size of the household survey is quite small, which means that it would be unwise to read too much into any one aspect of the report.
但是入户调查的样本容量太小了，这意味着不能很好的理解报告的任何一个方面。
There was a time in my life when I owned only one pair of shoes - a size too small with holes in them.
我生命中有一段时间只有一双鞋子-尺码偏小，上面还有很多洞。
There was a time in my life when I owned only one pair of shoes - a size too small with holes in them.
我生命中有一段时间只有一双鞋子-尺码偏小，上面还有很多洞。
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