Strangely enough, we know __2__more about things around us than on ourselves.
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However, we do not know yet how exactly we inquire language __5__and how it is possible for us to perceive through language
Now the slaughter has reached alarming proportions. __6__
One reason for this inadequate knowledge of language is that we, like language users, take too many things for granted. __8__Language。
that is, it is language that differs human from __4__animals.