Electricity cables and oil pipelines mar many of the world's most beautiful landscapes.电缆和输油管破坏了世界上许多优美的风景。Don't allow a minor irritation in the workplace to mar your ambitions.不要让工作中的一点烦心事打击了你的雄心抱负。Advertising hoardings mar the beauty of the countryside.广告牌破坏了乡村之美。