预测：
随着世界人口越来越密集(densely populated),空气污染已经成了严重的问题。空气污染主要来源于四个主要的人类活动领域：工业、能源业、交通运输业以及农业。经营工厂,为火车、飞机和公共汽车提供动力都需要能源。几乎所有这些能源都是通过燃烧燃料产生的,这就会造成空气污染。科学家们正在研究能减少环境破坏的新发电方式。增强的公共环保意识使诸如回收利用(recycling)等活动产生。
翻译范文：
As the world is getting more and more denselypopulated,air pollution has become a severeproblem.
Air pollution mainly derives from four majorhuman activity sectors:industry,energy,transportation andagriculture.
Energies are needed to run factories,to power trains,planes and buses.
Nearly all ofthese energies are produced by burning fuels,which would cause air pollution.
Scientists arestudying new ways of generating electricity that can be less damaging to the environment.
Theincreased public environmental awareness has led to the advent of activities such as recycling.
热门关键词推荐：
四六级报名 四级阅读辅导 四级翻译技巧 英语四级词汇表 四级翻译汇总 英语四级口语 六级阅读辅导 英语六级语法 英语六级阅读 六级翻译汇总 六级口语词汇 六级作文模板
