2014.06.21【英译中】Warm blooded or cold? Dinosaurs were somewhere in between 2

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发表于:2014-06-22 14:27 [只看楼主] [划词开启]
As scientists unearthed remains of more and more fast-looking dinosaurs like Velociraptor, some championed the idea dinosaurs were as active and warm–blooded as mammals and birds. The realization that birds arose from small feathered dinosaurs seemed to support that view.
科学家挖掘出越来越多的动作敏捷的恐龙如迅猛龙的遗骸,为“恐龙像哺乳类和鸟类一样属于敏捷的温血动物”这一观点提供支持。鸟类是从长有羽毛的恐龙进化而来这一认识,也似乎在支持着这一观点。

University of New Mexico biologist John Grady said the idea that creatures must be either warm-blooded or cold-blooded is too simplistic when looking over the vast expanse of time. Like dinosaurs, some animals alive today like the great white shark, leatherback sea turtle and tuna do not fit easily into either category, Grady added.
新墨西哥大学的生物学家约翰·葛瑞德说:在时间的漫漫长河中,判断生物到底是属于温血还是冷血动物的想法过于简单化了。葛瑞德补充道:像恐龙一样,一些至今存活着的动物,比如大白鲨、棱皮海龟和金枪鱼,都不能简单地归入这两者。

"A better answer would be 'in the middle.' By examining animal growth and rates of energy use, we were able to reconstruct a metabolic continuum, and place dinosaurs along that continuum. Somewhat surprisingly, dinosaurs fell right in the middle," Grady said.
“最好的答案是介于两者之间。调查了动物生长和能量使用率,我们能将新城代谢的进化看成一种连续的过程,并将恐龙置于其中。某种程度出乎我们的意料,恐龙正好在正中间。”葛瑞德说。

The researchers called creatures with this medium-powered metabolism mesotherms, as contrasted to ectotherms (cold–blooded animals with low metabolic rates that do not produce much heat and bask in the sun to warm up) and endotherms (warm–blooded animals that use heat from metabolic reactions to maintain a high, stable body temperature).
研究者把这种利用能量的方式介于两者之间的生物称为中温动物,和变温动物(保持低新陈代谢率,自身不产生大量热量,而是利用日晒来提高体温的冷血动物)与恒温动物(用提高新陈代谢率来保持高而恒定的体温的温血动物)相区别。

Grady said an intermediate metabolism may have allowed dinosaurs to get much bigger than any mammal ever could. Warm–blooded animals need to eat a lot so they are frequently hunting or munching on plants. "It is doubtful that a lion the size of T. rex could eat enough to survive," Grady said.
葛瑞德说:介于两者之间的新城代谢可能是恐龙能长得比任何哺乳动物都大的原因。温血动物需要吃很多因此总是频繁捕猎或是咀嚼植物。“我很怀疑体型跟霸王龙一样的狮子,能不能吃到足够多的食物生存下来”。葛瑞德说

(Reporting by Will Dunham; Editing by Marguerita Choy)


最后编辑于:2014-06-22 20:21
分类: 英语
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