The development and construction of river basin will bring positive and negative impacts to the environment.
流域开发建设，必然对环境造成影响，其中有有利的也有不利的影响。
The development and use of energy may bring out many negative impacts with different degrees on the environment.
能源开发利用会对环境产生不同程度的不利影响。
It was concluded that YJ-2000 not only showed low toxicity to the silkworm, but also acted no marked negative impacts on growth and development, cocooning as well as fecundity of the silkworm.
综合分析认为：YJ 2 0 00菌株对家蚕不仅低毒，而且对其生长发育、结茧和生殖力等均无明显的不良影响。
It was concluded that YJ-2000 not only showed low toxicity to the silkworm, but also acted no marked negative impacts on growth and development, cocooning as well as fecundity of the silkworm.
综合分析认为：YJ 2 0 00菌株对家蚕不仅低毒，而且对其生长发育、结茧和生殖力等均无明显的不良影响。
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