When did humans first go into space?
人类第一次进入太空是什么时候？
How come humans speak so many languages?
为什么人类会说这么多种语言？
He thinks AI will be positive for humans.
他认为人工智能将对人类产生积极影响。
It took humans 10,000 years to learn how to grow most of the crops we now take for granted.
人类花了1万年的时间，才学会种植我们现在习以为常的大部分农作物。
Those findings suggest that caloric restriction could delay ageing and increase longevity in humans, too.
这些发现表明，限制热量摄入也可以延缓衰老，延长人类寿命。
Technological development is to provide humans with a life of high quality instead of replacing human beings.
技术发展是为了给人类提供高质量的生活而不是替代人类。
Let's talk about the other end of the acoustical spectrum, sound that is too high for humans to hear—ultrasound.
让我们来谈谈声谱的另一端，人类听不到的声音——超声波。
A century ago, chemist Svante Arrhenius started one of the first debates over the potential for humans to influence the planet's climate.
一个世纪前，化学家斯万特·阿伦尼乌斯就人类影响地球气候的可能性展开了最早的辩论之一。
The results of two recent unrelated studies support the idea that dolphins may share certain cognitive abilities with humans and great apes.
最近两项不相关的研究结果支持了这样一种观点，即海豚可能与人类和类人猿具有某些相同的认知能力。
Crying as an expression of feeling is unique to humans and has played an essential role in human evolution and the development of human cultures.
哭泣作为一种情感的表达是人类独有的，这在人类进化和人类文化的发展中发挥了重要的作用。
Barbara Frederickson, a leading international authority on the importance of positive emotions, says humans are genetically programmed to seek positive emotions such as love and joy.
芭芭拉·弗雷德里克森是研究积极情绪重要性的国际领先权威，她说，人类的基因决定了寻求积极情绪，比如爱和快乐。
Guilt, by prompting us to think more deeply about our goodness, can encourage humans to make up for errors and fix relationships.
内疚促使我们更深入地思考我们的美德，进而可以鼓励人们弥补错误和修复关系。
It could play chess even better than humans.
它可以下国际象棋，甚至比人类下得更好。
If they hadn't been curious, what a loss for humans!
如果他们没有好奇心，那对人类来说是多大的损失啊！
Earth is home for all living things—humans, animals, plants, and even tiny microbes.
地球是所有生物的家园——人类、动物、植物、甚至是微小的微生物。
The rolling sea of clouds you see once you are at the top will remind you how tiny we humans are.
当你登上山顶时，你看到的滚滚云海会提醒你，我们人类是多么渺小。
The rolling sea of clouds you see once you are at the top will remind you how tiny we humans are.
当你登上山顶时，你看到的滚滚云海会提醒你，我们人类是多么渺小。
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