Darwinism

例句：

1. 1.Darwinism is the theory that all living things have evolved from a common ancestor.
   达尔文主义是所有现存生物都源自共同祖先的理论。
2. 2. The concept of natural selection has been a fundamental part of evolutionary biology for over a century.
   自然选择的概念已经作为进化生物学的一个基本部分存在了超过一个世纪。
3. 3. In his book, Darwin proposed that species evolve through natural selection.
   在他那本书中，达尔文提出了物种通过自然选择进化的观点。