| 1. | No . of course not . natural selection
不，当然不是物竞天择 |
| 2. | " thing jing day select , winning bad tai " is only survival rule
“物竞天择、优胜劣汰”是唯一的生存法则。 |
| 3. | Natural selection has favored certain defenses against cancer but cannot eliminate it altogether
天择产生某些对抗癌症的方法，但未能完全消弭癌症。 |
| 4. | But groups with similar physical characteristics as a result of selection can be quite different genetically
但是受天择塑模的体徵，并不反映族群的遗传组成。 |
| 5. | What favored the evolution of such distinctive brainpower in humans or , more precisely , in our hominid ancestors
在人类的演化过程中，天择为何青睐人类突出的脑力？ |
| 6. | Ironically , natural selection may even inadvertently provide some of the tools that cancer cells can use to grow
讽刺的是，天择甚至可能无意中提供了癌细胞生长的工具。 |
| 7. | In contrast , two groups that are genetically similar to each other might be exposed to different selective forces
另一方面，两个遗传组成相似的人群，也许会暴露在不同的天择压力下。 |
| 8. | Any random mutation in an intron that proved beneficial to the host organism would have been retained by natural selection
插入子内任何偶然的突变，只要对宿主有利，就会在天择的筛选下保留。 |
| 9. | If subsequent generations maintain these extra genes , natural selection may preserve useful mutations that arise in them
如果后代持续保有这些重复的基因，天择就有可能将其中有用的突变保留下来。 |
| 10. | For instance , skin color or facial features ? traits influenced by natural selection ? are routinely used to divide people into races
举例来说，肤色或面孔特徵（都是受天择影响的形质）是通用的人种判准。 |
