求用英语翻译一句话（许多人都养成了乱扔垃圾的坏习惯）据我观察可分为两类,一类扔的很熟练,另一类则更熟练.括号内为前提,希

（Many people have the bad habit of littering)according to my own observation,they can be divided into two kinds; one of them throw rubbish away quite skillfully,and the other one can do it even more skillfully!
自己翻译的,