And throw garbage anywhere you might see two different situations one is:a child in the hands of the rubbish carelessly dropped it on the ground of his parents saw will severely made the little boy put the rubbish up and throw it into the garbage bin and the other one is:a child hand things fall to the ground after the adults have seen but to see without see this is two kinds of different performance of the former is worthy of our study and the latter should be our criticism