Intensively used grasslands are also harmed as the soil is continually crushed under the weight of heavy animals.
VOA: special.2010.01.19
This concept of introducing foreign genes, genes that are made of recombinant DNA into animals using this kind of technique is widely used in biomedical research.
这种通过基因重组,来向动物体内导入外源基因的方法,广泛应用于,各种生物医药的研究中
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