人口的增长导致对世界上固定的空气、水、土地的需求不断增长。与人口增长相伴的是越来越多的人渴望着更高的生活水平。
Polution expansion leads to the increasing demand for fixed air, water and land. It naturally follows that more and more people long for high living standard.
传统的空气污染监测仪通常安装在灯柱上，并被固定在距离地面约九英尺的空中。
Conventional air pollution monitors are normally fixed on lampposts at about nine feet in the air.
我听着山中打雷和大雨倾泻的声响，打开由木刻乌龟固定着的窗纸，屋外已经是暮色苍茫了，我深深呼吸了一口新鲜的空气。
Opening paper shutters held back by carved wooden turtles, I look out into the semi-dark and smell the fresh air.
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