每日科学(2010年9月12日)——帮助繁殖生育过程的成功会依赖于季节。
ScienceDaily (Sep. 12, 2010) - the success of an assisted reproduction procedure may depend on the season.
如果没有死亡，你也就抛掉了出生的需要：事实上，如果你不断地繁殖生育，最终就必须要使老年人死亡，为新生儿留出生存的空间。
Do away with death and you do away with the need for birth: in fact if you went on breeding, you would finally have to kill old people to make room for young ones.
弗兰肯斯坦博士造出他的怪物时，他曾就是否应该允许它繁殖生育而深思这样一个道德问题：“我有权利为我自己的利益而降祸于子孙后代吗？”
Frankenstein made his monster, he wrestled with the moral issue of whether he should allow it to reproduce: "Had I the right, for my own benefit, to inflict the curse upon everlasting generation?"
由于害虫有巨大的繁殖潜力和基因多样性，许多害虫被认为能够抵抗合成化学物质，而且生育的后代对杀虫剂具有内在的抵抗力。
Because of their tremendous breeding potential and genetic diversity, many pests are known to withstand synthetic chemicals and bear offspring with a built-in resistance to pesticides.
这种鲸鱼环游了6,000英里到暖水湖里生育繁殖。
The whales migrate some 6,000 miles to breed and calve in the warm lagoons.
袋鼠雌袋鼠在植物繁殖力充足的时候生育后代是有利的。
It is advantageous for a kangaroo female to produce young at a time when plant productivity is sufficient to support her offspring.
它们很可能在陆地上进行生育繁殖，而且，走鲸在陆地上移动时非常像现代海狮。
On land, where it probably bred and gave birth, Ambulocetus may have moved around very much like a modern sea lion.
换句话说，优良的母亲有利于生育繁殖。
There is reproductive advantage in good motherhood, in other words.
他们也由此认定，大多数动物——哺乳动物，鸟类，爬行动物，两栖动物和鱼类——在春天生育繁殖。因为春季白天开始变长，气温也日渐回升。
That is why, they believe, most animals — mammals, birds, reptiles, amphibians and fish — produce their young and multiply in spring.
它们繁殖率较高，每两年可生育4只虎崽，因此如果得到庇护，老虎数目就会回升。
They have relatively high reproductive rates, producing as many as four cubs every couple of years, so their populations can rebound if sheltered.
然而，世界大部分地区的生育率(繁殖力)已经下降。
However, the fall in fertility is already advanced in most of the world.
马尔萨斯个人认为富裕人群会生育更多子女，正如生物学家所说，动物繁殖数量会因食物的增加而增加。
Malthus himself thought richer people would have more children and, as any biologist will tell you, animal populations increase when there is more food around.
原因就是，人类女性对自己的生育繁殖能力一直有隐藏的动机，而其他种类的动物则恰恰相反。
That's because women have a strong motivation to hide the fact that they're fertile, unlike other members of the animal kingdom.
海鳗数量的减少会导致海鸟生育能力下降，也就是说，繁殖鸟以及一些重要的鸟类数量会继续减少。 对此，自然保护主义者表示密切的关注。
Conservationists are concerned the drop in productivity, as a result of a lack of sandeels, will mean fewer breeding birds and continued decline of key species.
它们的繁殖很慢，近五年才生育一次。
They breed very slowly, they breed once throughout about five years.
“我想有些人认为这不怎么重要的原因，就是在社会生物学的观点看来，不管在什么时候，只要能成功生育和繁殖下一代就行了。”东卡罗莱纳大学人类学系的学科带头人琳达·沃芙如是说。
everything had to be tied to reproduction and reproductive success," said Linda Wolfe, who heads the Department of Anthropology at East Carolina University.
了解卵泡发育动态及其调控机理对于提高动物繁殖率和控制人类生育，都具有重要的意义。
A better understanding of follicular dynamics and its regulation is of great importance both for the improvement of animal reproductive productivity and birth control in human beings.
根据美国毒理研究机构提出的持续繁殖实验的方法，观察高本底放射性饮水对小鼠生育力及仔鼠生长发育的影响。
Using continuous reproductive tests, fertility of mice and the development of their offspringswere observed to evaluate the safety of the high background radiation containing drinking water.
但是，人类不仅仅只是鸡蛋的生产者（生育繁殖者）。
但是，人类不仅仅只是鸡蛋的生产者（生育繁殖者）。
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