It is not unlikely that the components in certain forms of air pollution might also operate to induce bronchus pastic responses by this mechanism . 某些形式的空气污染物成分通过这种机理也可能引起支气管痉挛。
The dissemination of pollution from large population centres is by its nature a statistical process and one cannot specify a range . 来自大的人口聚集中心的污染扩散本来就是一个统计过程，所以不可能确定一个范围。
Progress in developing indices and monitoring techniques for air pollution were further advanced than in most other areas of environmental health . 在空气污染指数与监测技术方面的进展比环境健康其它领域的进展更为显著。
In this country there is about a twofold difference in mortality for areas of high atmospheric pollution compared with the smoke-free rural areas . 在这个国家，大气高度污染的地区与没有烟尘的乡村比，死亡大约有两倍的差异。
More research is needed to develop effective methods of removing volatile chemicals from waste streams without contributing to the problem of air pollution . 要注意多研究从废水中除去挥发性化学物质而又不引起空气污染的有效方法。
Emphasis on pollution abatement may cause recovery systems to be installed, especially if production cost can be brought near the break-even point . 消除污染的强烈要求可能促使建立各种回收系统，要是生产费用接近不赚不负的话更是如此。
An overloaded poorly maintained gasoline-or diesel-powered vehicle pouring out black smoke is an extreme illustration of visual air pollution . 以汽油或柴油为动力，维护得很差的，并排放黑烟的超载交通工具是可以看到的空气污染的最明显的例证。
One such compact, involving the states of new york, new jersey, and connecticut, created the interstate sanitation commission to abate pollution in the waters of the new york harbor area . 举一个例，纽约州，纽泽西州和康涅狄格州签订协议，成立了一个州际卫生委员会，用以防止纽约港口地区的水流污染。
The issue of airborn carcinogens in the non-occupational environment was thoroughly reviewed by the committee on biologic effects of atmospheric pollutions of the national academy of sciences . 关于非职业环境大气中的致癌物问题，美国国家科学院大气污染生物效应委员会已作了详尽的论述。
Pollution poses a great threat to our existence 污染对我们的生存造成巨大威胁。
