The genetic variation comes mainly from population, the sourceofvariation among populations is relatively little.
遗传变异主要来源于种群内，居群间变异来源比较小。
2
A firm's embedness in a network of ties is an important sourceofvariation in the acquisition of competitive capabilities.
本文论述了企业知识网络的重要性，说明企业在关系网络中的嵌入是获取竞争能力的重要来源。
3
Experience shows that in creating theinitial data table and in the graphical representation of the process, thehuman element is a frequently overlooked sourceofvariation.