1. They built a primitive shelter out of tree trunks.
    他们用一些树干建造了一个简陋的棚子.

2. The first animals on this living sphere, the Earth, were primitive marine animals, and then around 500 million years ago these sea animals developed shells.
    在地球这个有生命的星球上，最早的动物是原始海洋动物。后来，在大约5亿年前，这些海洋动物进化成甲壳动物。

3. The unique character of the clicking sounds in their language has persuaded some researchers that the Khoisan people are directly descended from the most primitive human ancestors.
    他们语言中那种独特的短促而清脆的声音使得一些研究者认为科伊桑人是最原始的人类祖先的直系后裔。

4. And found our then prevailing primitive state completely uninteresting to their own advanced knowledge.
    并且发现我们地球汉时普遍存在着的原始状态同他们的先进的知识相比是索然无味的。

5. Anthropology was by definition impossible, as long as these distinctions between ourselves and the primitive, ourselves and the barbarian, ourselves and the pagan, held sway over people´s minds.
    只要我们同原始人，我们同野蛮人，我们同异教徒之间存有的区别在人的思想中占主工导地位，那么人类学按其定义来说就无法存在。

6. Similarly, our own present primitive chemical rockets, though good enough to orbit men,
    同样，我们目前使用的原始化学火箭，虽然把人送入轨道，

7. Our early ancestors counted days by the time between each sunrise and sundown, as some primitive peoples still do.
    早时，我们的祖先通过每次日出和日落之间的时间间隔来计算天，一些原始人现在仍然这样做。

8. Indeed, we lack practice and experience nowadays in dealing with primitive conditions.
    确实，我们现在缺少对付原始环境的实践和经验。

9. It is said that the nerve poison is the more primitive of the two,
    据说，神经毒液在两种毒液中是较为原始的一种，

10. In primitive cultures the obligation to seek and to receive the traditional instruction is binding to all.
    在原始文化中，寻求和接受传统教育的义务对全民都有约束力。