Of lowermost safety standard is pair of cost - a of benefit analysis method main environmental complementfactor.
最低安全标准＂是对成本-效益分析方法的一个重要的环境补充因素。
2
Elasticity of substitution — a measure of the degree to which two factor inputs complement or substitute for one another in production.
弹性代换——产品中的两个因素投入产品中相互补充或是代替的衡量度数。
3
Decay accelerating factor(DAF)is one of the important membrane regulating protein in the complement activating ways. The transgenic pigs for human DAF gene can used for xenotransplatations donors.