R50 Very toxic to aquatic organisms.
对水生生物有极高毒性；
Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
对水生生物有毒，可能在水生环境中造成长期不利影响。
Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
对水生生物有毒，可能对水体环境产生长期不良影响。
Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
对水生生物有害，可能在水生环境中造成长期不利影响。
Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
对水生生物有害，可能对水体环境产生长期不良影响。
Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
对水生生物有极高毒性，可能对水体环境产生长期不良影响。
R51/53 Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
对水生生物有毒，可能对水体环境产生长期不良影响。
R52/53Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
对水生生物有害，可能对水体环境产生长期不良影响。
It is shown that the method by monitoring sediment or aquatic organisms can increase monitoring sensitivity.
调查表明：采用监测河流底泥或水生物的方法可以提高监测灵敏度。
Yangtze River had always been the ideal habitat, breeding ground, and migration channel by aquatic organisms.
长江流域历来是水生生物理想的栖息地、繁殖场及重要的洄游通道。
Heavy metal ions in water can be concentrated in aquatic organisms, which may threaten human health through the food chain.
水体中的重金属离子可以在水生生物中富集，通过食物链危害人体健康。
For the time being, there is not potential threat to aquatic organisms for PAH concentrations both in water and sediment in Deep Bay.
目前，水体与沉积物中PAH含量对该海域的水生生物尚未构成威胁。
The environment behavior and effects of Isazofos on aquatic organisms in a paddy field and fish pond simulation ecosystem were studied.
建立稻田—鱼塘模拟生态系统，以研究氯唑磷农药在稻田—鱼塘模拟生态系统中的迁移、转化规律，及其对鱼、虾等水生生物的影响。
The paper describes the toxic effects of lindane to microbes and aquatic organisms, as well as the poisoning signs and the potential hazard.
本文介绍了林丹对微生物和水生生物的毒性、中毒症状及潜在危险。
The effects of water conservancy projects on water regime, aquatic organisms and water environment in Huaihe drainage area are discussed and analyzed.
该文从水情、水生生物、水环境质量等方面分析水利设施对淮河水域生态环境的影响。
Site hydrology assessment includes investigations into other areas like soils, depth requirements for aquatic organisms, wetland plant communities, etc.
基地水文评估包括调查土壤、水生生物需水深度、湿地植物群落等其它方面。
Algae these primarily aquatic organisms produce some 30 to 50 percent of the net global oxygen on earth and are important sources of food and crude oil.
海藻，主要生长在水中，输嘲分之30到50的全球氧气总量，还是食物和原油的重要来源。
Algae, these primarily aquatic organisms produce some 30 to 50 percent of the net global oxygen on earth and are important sources of food and crude oil.
海藻，主要生长在水中，输出百分之30到50的全球氧气总量，还是食物和原油的重要来源。
Dam sluice is one of the main factors that can result in Dissolved gas Supersaturation which can cause gas bubble disease and bring threat to aquatic organisms.
高坝泄洪是导致水中气体过饱和的主要因素，不仅能致鱼类气泡病，而且会给水生生物带来严重的危害。
This unique creature is part of an imperiled community of aquatic organisms in the Gulf of Mexico, where poor water quality and habitat loss have weakened the ecosystem.
这种独特的生物是墨西哥湾水生生物中遭到威胁的物种之一，墨西哥湾恶劣的水质和栖息地的丧失减弱了生态系统。
Since then, some 430 outdated dams have been removed from U.S. rivers, opening up habitat for fish and other aquatic organisms and letting rivers flow like rivers again.
从那时起，约430座过时的水坝在美国河流上消失，此举打通了鱼群和其他水生物的返回栖息地的通道，并重新让河流川流不息起来。
But in recent year, many ecological disaster events has been initiated by aquatic organisms from foreign area, posing serious threat to ecological environment security.
但是近年来外来水生生物物种引发了多起生态灾难事件，对生态环境安全构成了严重威胁。
Since then, some 430 outdated DAMS have been removed from U. S. rivers, opening up habitat for fish and other aquatic organisms and letting rivers flow like rivers again.
从那时起，约430座过时的水坝在美国河流上消失，此举打通了鱼群和其他水生物的返回栖息地的通道，并重新让河流川流不息起来。
Ballast water is the main invasion way of alien aquatic organisms. The complex effects caused by the aquatic organisms via ballast water have attracted world wide attention.
外来海洋生物主要是通过船舶压载水入侵，造成的影响极其复杂，已经引起了世界各国的广泛关注。
The harm of heavy metal to the aquatic organisms and the utilization of benthic animal to control the heavy metal was discussed and the important function of benthic animal was pointed out.
探讨了重金属对水生生物的危害及底栖动物对重金属的生物可利用性，指出海洋底栖动物对重金属治理有着巨大作用。
The basic reason of eutrophication is the enrichment of the nutrient in the water body such as nitrogen, phosphorus, which results in the excessive growth of algae and other aquatic organisms.
水体富营养化的根本原因是水体中氮、磷等营养物质的富集，使得藻类及其他浮游生物迅猛繁殖所致。
Most marine organisms need oxygen for survival, and dead zones prove fatal for many aquatic species.
大多数海洋生物需要氧气才能生存，因此死亡区对于许多水生物种来都证明是致命的。
Members of a group of mostly aquatic, photosynthetic organisms (see photosynthesis) that defy precise definition.
一群主要是水生的、能行光合作用而无法精确定义的有机体。
Algae bloom will release toxins and harmful substances, cause organisms mass deaths in water, bring serious harm to aquatic ecological environment.
藻类水华会释放大量毒素和有害物质，造成水生生物的大量死亡，给渔业生态环境带来严重危害。
Algae bloom will release toxins and harmful substances, cause organisms mass deaths in water, bring serious harm to aquatic ecological environment.
藻类水华会释放大量毒素和有害物质，造成水生生物的大量死亡，给渔业生态环境带来严重危害。
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