新婚祝福四字词不支持海洋开发的英语作文大世
篇一
科比的英文
象棋的下法The ocean and we are a whole, first of all, the ocean itlf has great handling of pollutants, dilution, diffusion, oxidation, reduction and degradation of purification ability. But the capacity is not unlimited, when toxic and harmful substances accepted by the local waters more than its own lf-purification ability, it will cau pollution of the waters. In addition the ocean while contains many resources, but the regeneration of marine resources is the need of time, if the development of marine resources we uncontrolled and not pay attention to the protection of the resources, so there is always ud in the light of day. So the protection of the marine is extremely important.
篇二
Marine lives in fish and all kinds of chemical substances, is very important for human. but many people like throw garbage into the a, the a will pollution. cau fish death, water depletion. we should keep our environment, to protect the beautiful a.
我爱书
The as and oceans receive the brunt of human waste, whether it is by deliberate dumping or by natural run-off from the land.
黄连阿胶鸡子黄汤In fact over 80% of all marine pollution comes from land-bad activities and many pollutants are deposited in estuaries and coastal waters. Here the pollutants enter marine food chains, building up their concentrations until they reach toxic levels. It often takes human casualties to alert us to pollution and such was the ca in Bay in Japan when many people died as a result of a pollutant building up in food chains. A factory was discharging waste containing methyl mercury in low concentrations into the a and as this pollutant pasd through food chains it became more concentrated in the tissues of marine organisms until it reached toxic levels.
As a conquence 649 people died from eating fish and shellfish contaminated with mercury and 3500 people suffered from mercury poisoning.
迥然不同的近义词>胎宝宝
