Humans and animals all have sense of smell.Smelling plays an important role in our daily life.Without it,we can not enjoy the pleasure of life.
The uses of smelling are more than those mentioned above.It can also be used for life to solve different kinds of problems for people.
In most cases,the smelling of animals is more sensitive than humans'.The dog is an example.Dogs can catch criminals and help blind people recognize the roads by using their smelling.
With a view to serve for humans,the uses of smelling should be widely developed.
这是偶自己翻译的>< 希望LZ满意.