例如，人类的平均寿命在几千年里几乎没有改变。
For example, the average duration of human life has hardly changed in thousands of years.
一个科学家告诉采访者说，他预计，人类的平均寿命将千年！
One scientist told the interviewer that he expects the average human lifetime to be 1000 years!
另一方面，在医学上，人类将可以解决所有的疾病，人类的平均寿命可以达到125岁。
On the other hand, in medicine, human beings will be able to solve all of the disease, the average life expectancy of mankind can reach 125 years old.
从这项研究中，我们发现在过去的近20年中，人类的平均寿命不断增加而婴儿死亡率却在不断下降。
From this research, we can find that the life expectancy increases nearly 20 years and the infant mortality decreases greatly.
那我们是不是就可以由此推出——日后的医学突破将会使人类的平均寿命再得到延长，或是，人类已经达到了生命的极限？
Does this mean that future medical breakthroughs will result in even longer average life spans, or have we reached our limit?
那我们是不是就可以由此推出——日后的医学突破将会使人类的平均寿命再得到延长，或是，人类已经达到了生命的极限？
So does this mean that future medical breakthroughs will result in even longer average life spans, or have we reached our limit?
随着物质生活的不断提高，人类的平均寿命有不断变长的趋势。一些科学家们也开始仔细思考这个趋势是否会一直持续下去帮助人类达到永生。
The average life span of humans continues to lengthen, and some scientists have begun to ponder whether this trend will continue indefinitely.
而今天人类能活到65岁，在有些国家如日本和加拿大，平均寿命超过了80岁；非洲以外的地区，鲜有儿童死亡。
Today people live to 65 and, in countries such as Japan and Canada, over 80; outside Africa, a child's death is mercifully rare.
现在的多数专家同意人类平均寿命会继续增加，但对增加多少却有不同看法。
Most experts now agree that there will be further rises, but disagree about their extent.
约30年前，斯坦福大学医学院的JamesFries把人类平均寿命的可能上限定为85岁。
Nearly 30 years ago James Fries at Stanford University School of Medicine put a ceiling of 85 years on the average potential human life span.
猫科专家说，猫的平均寿命只有15岁，而露西已经活了39岁，相当于人类的172岁，比一般猫的寿命超出了不止一倍。
Cat experts say she has clocked up the equivalent of 172 human years - and cats live to be about 15 on average which means Lucy has more than doubled her life expectancy.
猫科专家说，猫的平均寿命只有15岁，而露西已经活了39岁，相当于人类的172岁，比一般猫的寿命超出了不止一倍。
Cat experts say she has clocked up the equivalent of 172 human years - and cats live to be about 15 on average which means Lucy has more than doubled her life expectancy.
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