It means the work u dont know u shouldnt do it..

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hope it helps..
mark me as brainliest plss..
It means that you don't know about it and begin to do it but after rhe failuq
The Brainliest Answer!
 it means that :who blames his failure on other things without skill
                       kaam krna nhi aata,isliye doosro par bahaane banata hai

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