Before the first human has traveled to space and back there were twenty nine launches with dogs.
在人类开始进入太空之前，有29次是狗进入了太空。
A human has a bone just after the spine ends, which helps proves that humans once had tails (possibly).
人在脊椎末端有一块骨头，这有助于证明人类(可能)曾经有过尾巴。
Since the crew of Apollo 17 returned from the moon in December 1972, no human has ever left low-Earth orbit.
自从1972年12月阿波罗17号的机组成员从月球返回地球以来，再没有人飞出过近地轨道。
Realize that you are a unique person with the ability to create and conjure ideas that no human has had before you.
应认识到自己是独一无二的，是有能力产生和设想出他人不曾有过的点子的。
It isn't the right of any person to tell another what to believe, for no human has a full understanding of anything.
任何人都没有告诉别人该信什么的权利，因为没有人是全知全解的。
And this is because we could effortlessly produce and understand sentences that no human has ever said before on earth.
这是因为我们可以毫不费力地创造和理解，那些世上从未有人说过的句子。
Everything that matters in being human has to do with one's powers of agency, but there are no actual foundations in what we can know objectively for our beliefs and actions.
人所有要紧的事情，都与自身的能动作用有关，但是在我们能客观知道的信仰和行为中，并没有实际的基础。
On the one hand, the Apollo program truly was a spectacular success, but it also marked the end of progress - no human has traveled more than 400 miles away from Earth since 1975.
一方面阿波罗计划确实是一个巨大的成功，但是它同时标志着进步的终结——从1975年起人类就再也没有涉足过地球400英里(643公里)外的地方了。
The human form has changed little over the last 30 000 years.
3万多年以来，人的体形没有多大变化。
It would be the first time in human history that economic necessity has prevailed over military aggrandizement.
经济需要压过了军事扩张，这将是人类有史以来的第一次。
Human-induced climate change has brought humanity to a position where we shouldn't exclude thinking thoroughly about this topic and its possibilities.
人为导致的气候变化已将人类置于一个我们不得不全面思考这个问题及其可能导致的后果的局面。
In our times, human shrewdness has mastered the deep mysteries of the earth at a level far beyond the capacities of earlier peoples.
在我们这个时代，人类的精明已足以掌握地球的深层奥秘，其程度远远超过了早期人类的能力。
Human beings are immortal, not because he alone has a say in all things, but because he has a soul, a spirit of compassion, sacrifice, and endurance.
人类是不朽的，这不是因为万物当中仅仅他拥有发言权，而是因为他有一个灵魂，一种有同情心、牺牲精神和忍耐力的精神。
A human study has found strong links between BPA levels and semen quality, and the findings are not looking good.
现在，一项人类研究发现了双酚A含量和男性精子质量之间有密切关联，结果并不乐观。
Over the past century, human use of fresh water has increased at more than double the rate of population growth.
在过去的一个世纪里，人类对淡水的使用以超过人口增长率两倍的速度增长。
The development of industry has been a gradual process throughout human existence, from stone tools to modern technology.
从石器工具演进到现代技术，工业的发展是一个贯穿人类生存的渐进过程。
If we acknowledge that human manipulation of the Earth has been a destructive force, we can also imagine that human endeavours can help us build a less destructive world in the centuries to come.
如果我们承认人类对地球的操纵是一种破坏，我们也可以认为，人类的努力可以帮助我们在未来几个世纪建立一个破坏性较小的世界。
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。
But 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.
但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。
Indeed, the human history has not been merely touched by global climate change, some scientists argue, it has in some instances been driven by it.
事实上，一些科学家认为，人类历史不仅仅受到全球气候变化的影响；在某些情况下，它还受到全球气候变化的推动。
Everyone who is involved with other human beings in any social context has similar difficulties.
在任何社会环境中与他人交往的每一个人都有类似的困难。
The treatment will be tried out on human beings only after it has been shown to be safe and foolproof in animals.
该疗法只有在动物身上证明安全、万无一失后才会在人体上试用。
Research on athletes and ordinary human subjects has yielded a mixed bag of results.
对运动员和普通人的研究得出了混合的结果。
The United Nations Secretary-General has spoken of the need for individual freedoms and human rights.
联合国秘书长谈到了个人自由和人权的必要性。
For example, the average duration of human life has hardly changed in thousands of years.
例如，人类的平均寿命在几千年里几乎没有改变。
Emulating your conversation partner's actions is a common human behavior classified as "mirroring" and has been known and studied by psychologists for years.
模仿谈话对象的动作是一种常见的人类行为，被归类为“镜像”，而心理学家对其的认知和研究已有多年。
Emulating your conversation partner's actions is a common human behavior classified as "mirroring" and has been known and studied by psychologists for years.
模仿谈话对象的动作是一种常见的人类行为，被归类为“镜像”，而心理学家对其的认知和研究已有多年。
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