本文对滨海湿地退化的主要原因进行了分析，指出围垦、城市与港口开发、污染及生物资源过度利用是造成滨海湿地退化的主要因素。
Land reclamation, city and port development, pollution and excessive use of coastal biologic resource are considered as the main environmental forcing factors to the degradation of coastal wetlands.
车况、燃油质量、高比例的柴油车及气候等因素是造成路边空气中羰基化合物污染的重要原因。
Vehicular maintenance, oil quality and high proportion of diesel-run vehicles may be top factors to cause higher concentrations of carbonyl pollutants in Guangzhou.
在此针对串层污染形成原因及影响因素，提出了防治对策。
Aimed at cross strata polluted water formation and influential factors, the authors put forward control countermeasures.
在此针对串层污染形成原因及影响因素，提出了防治对策。
Aimed at cross strata polluted water formation and influential factors, the authors put forward c...
在此针对串层污染形成原因及影响因素，提出了防治对策。
Aimed at cross strata polluted water formation and influential factors, the authors put forward c...
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