1. Knowledge began to increase as soon as the thoughts of one individual could be communicated to another by means of speech.
    人一旦能用语言同别人交流思想，知识的积累便开始了。

2. Humidity means the amount of moisture in the air.
    湿度指空气中水汽的含量。

3. His only means of identification was his passport.
    他唯一证明他身份的办法是用他的护照.

4. His goal, he announces on the cover, is to redefine what it means to be smart.
    在书的封面上，他说他的目标就是要重新定义聪明到底是什么。

5. Affluent he may be, But he is by no means sure what to tip the doorman or the chambermaid.
    尽管他可能是富裕的，但他一点不知道该付多少小费给看门人和清理卧室的女服务员。

6. Affluent he may be, But he is by no means sure what to tip the doorman or the chambermaid.
    尽管他可能是富裕的，但他一点不知道该付多少小费给看门人和清理卧室的女服务员。

7. Affluent he may be, but he is by no means sure what to tip the doorman or the chambermaid.
    他们可能很富有，但给看门人和房间女服务叫多少小费，心中却根本没有数；

8. All these means have become one of the features of modern life.
    所有这些手段都形成了现代生活的特色之一。

9. And that means that the nucleus must be intact.
    这就意味着细胞核必须保持完整。

10. A more effective technique is "reframing", which means consciously reinterpreting a situation in a more positive light.
    较为有效的办法是"重新建构"，就是说有意识地以更积极的眼光来重新审度局面。