不乱扔垃圾/No litter－在线英语听力室...
Child : Why is there so much garbage in the street,Mom? Mother : Because there are many litterbugs. Child : What are litterbugs? Mother : They're people who don't put their rubbish in trash cans. 垃圾虫 小孩：妈妈，为什么街上有这么多垃...
