pollute vt.弄脏，污染;腐蚀
历年真题：Scientists say both studies demonstrate that certain parts of the ecosystem(生态系统)respond rapidly to reductions in atmospheric pollution, but that these findings should not be used as a license to pollute.(2005年1月阅读)
译文：科学家宣称，两项研究都表明部分生态系统会对空气污染做出迅速的反应从而降低它们，但是这些发现不能被用做为污染的通行证。
pollution n.污染，污染物
典型例句：Changes in the climate are partly due to pollution of the atmosphere by industrial waste.
译文：气候变化的部分原因在于，工业废物污染了大气。
想一想：pollute
Key:v.污染，玷污，弄脏
pond n.池塘
典型例句：There is a flock of water-fowl on the pond.
译文：池塘里有一群水鸟。
想一想：pond lily
Key:n.睡莲，荷花
portable a.便于携带的，手提式的
典型例句：They are very cheap and extremely portable.
译文：它们很便宜，又极轻便。
porter n.搬运工人;看门人，大楼管理员
典型例句：He applied for a job as a porter.
译文：他申请搬运工人的工作。
想一想：porterage
Key:n.搬运，搬运业;搬运费