Revise the following sentences.Try to make them concise.The substance,which was discovered almost by accident,had revolutionized medicine.
问题描述：
Revise the following sentences.Try to make them concise.
The substance,which was discovered almost by accident,had revolutionized medicine.
答
The substance was found almost by chance, had ...
答
The substance discovered almost by accident had revolutionized medicine
答
The cubstance discovered almost by accident had revolutionized medicine.