| 1. | All organisms have nucleic acids present in their cells .
所有生物的细胞中都有核酸。 |
| 2. | He seemed doomed to a vegetable existence for the rest of his days .
他的有生之日似乎注定要过简单生物的生活了。 |
| 3. | Biological activity in a soil is influenced by soil acidity and nutrient status .
生物的活动被土壤养分含量状况所制约。 |
| 4. | In man's early days, competition with other creatures must have been critical .
在人类的早期，人和其他生物的竞争想必是生死攸关的。 |
| 5. | Naturalists differ much in determining what characters are of generic value .
自然学者对于不同性状决定生物的属的含义上，各有各的见解。 |
| 6. | I am only surprised that more wrecks of ancient life have not been preserved .
我所感到奇怪的，只是这些古代生物的残余没有被保存得更多。 |
| 7. | What he did have was inexhaustible energy and enthusiasm and a love of living things .
他所具备的是永不衰竭的精力和热情，以及对生物的爱好。 |
| 8. | Without competition from other organisms, the pathogen may grow very rapidly with serious damage .
没有其他生物的竞争病原生长迅速，危害严重。 |
| 9. | The affinities of all the beings of the same class have sometimes been represented by a great tree .
同一纲内一切生物的亲缘关系，常常可用一株大树来表示。 |
| 10. | One common question is: what are the properties that distinguish living things from nonliving things ?
一个司空见惯的题目是：区别生物与非生物的基本特征是什么？ |
