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in the field of public health, necessary protective measures are taken to facilitate pollution control, especially in big cities where photochemical pollution is regarded as the main cause of the problem owing to car and industrial gases.
502. 在公共卫生领域,采取了必要的保护措施,促进控制污染,特别是在大城市,在那里光化学污染被认为是问题的主要原因,是由汽车和工业气体造成的。
according to howard (1991), estimates for the rate of photochemical oxidation of hcbd by the hydroxyl radical could be based on the measured rate constant for the reaction of the hydroxyl radical with tetrachloroethylene.
根据howard(1991年),可依据测得的氢氧自由基与四氯乙烯的反应速率常数估计六氯丁二烯通过氢氧自由基发生光化学氧化的速率。