...；农业生产；污染防治措施 [gap=482]Keywords: pollution of water bodies; crop productionon; measures of pollution control ...
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Pollution control measures are either not strict or nonexistent, leading to choking clouds of smog.
污染控制措施要么不严格要么不存在，导致了令人窒息的雾霾。
No area in the world is completely free of air pollution. We must take measures to control it.
世界没有不遭空气污染的地方，我们必须采取措施加以控制。
This article introduces the pollution effect factors of WJD-0.75 power shovel vehicle, and describes the pollution control and precaution measures.
本文详细介绍了污染对WJD - 0 . 75电动铲运机液压系统的影响，并对铲运机污染的预防与控制措施进行了阐述。
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