please don't litter 这句是什么意思

please don't litter 这句是什么意思 Don't pick flowers.Don't litter.写出同义句 Don't litter(用shouldn't改写同义句） Please don’t fight.这是什么句? Please don't leave me,i need you. 这句是什么意思啊? ----Don't litter things about. Don't drop litter anywhere. Don't drop litter e______ don't litter 什么意思 don't litter的意思 Don't litter carelessly.同义句Don't ____ _____ _____. 谁知这道题的答案don't drop litter in the park,please