然而，后一个问题，生物学已经有了几种解释，它们都以长寿命与生殖能力的平衡为中心。
For the latter, though, biology has several explanations, all of which revolve around a trade-off between longevity and the ability to reproduce.
这个现象表明对人类寿命差异的解释也许根植于我们的生物学中。
This phenomenon suggests that the explanation for the difference within humans might lie deep in our biology.
这项新的研究发表在《公共科学图书馆·生物学》上，在该研究中，产生更多自由基的蠕虫或者服用了促进产生自由基的除草剂的蠕虫竟然比普通蠕虫的寿命长。
In the new study published in PLoS Biology, worms that made more free radicals or that were treated with a free-radical-producing herbicide actually lived longer than normal worms.
得分和更长的寿命。如果科学家们能够解决造成这种生物学差异的原因，也许就能缓解人们的先天差距。
And if scientists can unravel what underlies these biological differences, they might be able to alleviate inborn disparities.
结果：转染后细胞寿命延长，增殖旺盛，并保持正常细胞生物学特征。
Results: After transfection, stable expression of hTERT mRNA were detected. The cells had an extended lifespan and proliferative potential.
赛艇运动员的运动寿命受多方面因素的影响和制约，主要为医学—生物学因素、训练学因素和社会学因素。
The canoeists' sporting life is affected mostly by factors related to medical science, biology, sports training and sociology.
“在我家附近生活的松鼠有25年的寿命，但和它们看起来长得差不多的老鼠只能活两年，”衰老生物学研究领域的先驱、来自哈佛医学院的加里·鲁夫库恩（GaryRuvkun）说。
"The squirrels in my neighborhood have a 25-year life span, but they look like rats that live two years, " said Gary Ruvkun, a pioneer in aging biology at Harvard Medical School.
对松突圆蚧花角蚜小蜂的形态、发育、繁殖、成虫寿命和取食寄主行为等生物学特征进行了观察。
Its morphology, development, reproduction, longevity and host-feeding behaviour were studied. Female larvae of C. azumaidevelop as primary endoparasitoid of H.
对松突圆蚧花角蚜小蜂的形态、发育、繁殖、成虫寿命和取食寄主行为等生物学特征进行了观察。
Its morphology, development, reproduction, longevity and host-feeding behaviour were studied. Female larvae of C. azumaidevelop as primary endoparasitoid of H.
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