Human beings needed to use tools because they did not have sharp teeth like other meat-eating animals, such as lions and tigers.

人类需要使用工具，因为他们没有像其他食肉动物如狮子和老虎那样锋利的牙齿。

youdao

Human beings like to think of themselves as possessing unique capabilities such as being able to use tools, employ a language with syntactic rules and process complex mathematical equations.

人类总是觉得他们具备一些独特的能力，诸如能够使用工具、采用一种具有语法规则的语言和处理复杂的数学方程序。

youdao

Television is more than just an electronic system, however. It is a means of expression, as well as a vehicle for communication, and as such becomes a powerful tool for reaching other human beings.

但是，电视不仅仅是一个电子系统，它还是一种表达工具和传播渠道因此，电视成了一个对其他人发生影响的强大工具。

youdao

How could we as intelligent human beings have such a far reaching impact on a land that didn't even feel like it belonged to the human race?

CNN: STORY HIGHLIGHTS

There are many other design-thinking principles that entrepreneurs need to heed, such as the fact that products and services are bought by human beings, not target markets segmented into demographic categories.

FORBES: Six Things Entrepreneurs Know That Are Dead Wrong

It describes how vulnerable species that overtly display characteristics human beings respect or find desirable -- such as beauty, strength, power or cuddliness -- are more likely to be the focus of concerted conservation programs than animals or plants that are less appealing to the eye.

CNN: Beauty trumps beast in conservation efforts