Reciprocal altruistic behavior exists not only among organisms but also in the society, but it has been hard to explain the altruistic behavior of organisms to the classical natural selection theory.
互惠利他行为是生物有机体乃至人类社会普遍存在的一种现象，经典的自然选择学说难以解释生物有机体的这类行为。
The complex and ever-changing society demands that we should satisfy the realistic needs in terms of our qualities and occupation selection.
复杂而多变的社会需求要求我们从自身素质和职业选择上满足现实需求。
Students, we will step is a challenging and competitive society, "survival of the fittest in natural selection, survival of the fittest" is our survival environment.
同学们，我们将要跨入的是一个充满挑战和竞争的社会，“物竞天择，适者生存”将是我们的生存环境。
Meanwhile, selection of some 400 professionals from society and lower courts has begun, according to the Beijing News.
与此同时，挑选400名专业 人才的工作已经面向社会及下级法院展开。
Today, in the age of the information and Knowledge society, we are faced with this problem every single day, because Web searches and information selection are highly time-consuming activities.
今天，在信息和知识社会时代，我们每一天都面临着这个问题，因为网络搜索和信息筛选是非常耗时的活动。
The difficulty of spouse-selection of rural elder unmarried youth has aroused the attention of the whole society.
农村大龄未婚青年择偶难问题越来越受到社会各界的广泛关注。
The fifth part mainly aims to the Nobel prize influence on society, introspective to the rule of selection and the culture of the Nobel prize.
第五部分主要针对诺贝尔奖在社会上造成的影响，对诺贝尔奖的评奖规则和文化进行的反思。
The fifth part mainly aims to the Nobel prize influence on society, introspective to the rule of selection and the culture of the Nobel prize.
第五部分主要针对诺贝尔奖在社会上造成的影响，对诺贝尔奖的评奖规则和文化进行的反思。
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