问题描述：
Try to make them concise
The substance,which was discovered almost by accident,had revolutionized
medicine.
In this modern world of today,people never walk when they can ride.
We asked Mr.Wilson to give us advice because of the fact that he is such a wise man.
The substance,which was discovered almost by accident,had revolutionized
medicine.
In this modern world of today,people never walk when they can ride.
We asked Mr.Wilson to give us advice because of the fact that he is such a wise man.
问题解答：
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