01

今日长难句

The role of natural selection in evolution was formulated only a little more than a hundred years ago, and the selective role of the environment in shaping and maintaining the behavior of the individual is only beginning to be recognized and studied.

02

词汇解析

evolution 进化;演进

formulate 确切阐述;制定

a little more than 稍多于

03

结构分析

主干1:The role of natural selection in evolution was formulated(被动语态)

主干2:The selective role is only beginning to be recognized and studied(主谓宾)

注意:两个主干围绕 “环境对人的作用” 展开，前句一般过去时，后句现在进行时，形成昔今 对比，构成递进关系，其中 only、a little 均强调时间的“近”，强调研究尚不成熟。

04

参考译文

The roleof natural selection in evolutionwas formulatedonly a little more than a hundred years ago,
and the selective roleof the environment
in shaping and maintaining the behavior of the individualis only beginning to be recognized and studied.

自然选择在人类进化中的作用，仅仅在100多年前，才得以阐明。

环境在塑造和维持个体行为方面的选择作用，现在才刚刚开始得以认识和研究。