littering反义词clean up。
①littering乱扔垃圾v.使乱七八糟使凌乱乱扔使饱含，使遍布(一般指不好的东西)是litter的现在分词
例句He was arrested for littering.
他因乱扔垃圾被拘留。
②clean up全部，舁床，轿舆，褥草，落叶层，产仔，乱丢，铺褥草，弄乱，乱丢垃圾，乱扔垃圾，乱抛垃圾
Citywide campaigns are trying to curb public spitting， discourage public cursing and littering and also promote lining up.
城市范围内的运动正在展开，试图遏制在公共场所吐痰，劝阻市民说脏话和乱丢垃圾并鼓励排队。
③littering反义词clean up。
