natural selection

n. [生]自然选择, 物竞天择说

例句与用法:

A systematic long-term change of this kind suggests the action of natural selection and indicates that female skeletal characteristics confer greater fitness. But is this the whole story.

这种长期的系统变化说明自然选择的作用,并表明女性骨骼的特性较大的适应性。但是,情况完全是这样的吗?

词形变化:

名词: natural scientist |

详细释义:

ph.

【生】自然选择; 天择