littering
乱丢垃圾
例句与用法：
There were piles of litter in the streets.
街道上垃圾成堆。
He was fined for littering on the sidewalks.
他因在人行横道上乱扔杂物而被罚款。
Our cat has a litter of four kittens.
我们家的猫一窝养了4只小猫。
词形变化：
名词: litterer | 动词过去式: littered | 动词过去分词: littered | 动词现在分词: littering | 动词第三人称单数: litters |