Nature really is red in tooth and claw.

自然确实是血红的牙齿和利爪。

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Detailed analysis of the cut marks on the bones show they differ substantially from tooth and claw marks that can be left by predators.

骨头上切割痕迹的详细分析显示，它们与食肉动物留下的牙齿痕迹与爪痕存在本质的区别。

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Indeed, Darwin's Origin of -species by Means of Natural Selection, -published in 1859, seemed to vindicate Tennyson's adage from 20 years -earlier, of "nature red in tooth and claw".

实际上，1859年出版的达尔文著作《物种起源》似乎印证了坦尼森此前二十年的名句——“在尖牙利爪之下，自然是红色的”。

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If evolution is survival of the fittest, nature red in tooth and claw, how could animals evolve moral feelings?

如果进化论是讲适者生存，在弱肉强食的自然界，动物怎么能进化出道德情感？

耶鲁公开课 - 心理学导论课程节选

If both religion and reason are removed, all that remains is will and power, where the only law is the law of tooth and claw.

如果宗教和理性都被世人所摒弃,那么世间就只剩下了权力和欲望,而这世间唯一准则就只剩下了弱肉强食

耶鲁公开课 - 古希腊历史简介课程节选

The wider point here is that Blatter's tenure as FIFA president has been internationalist in tooth and claw.

CNN: Sympathy for the 'devil': In defense of Sepp Blatter

But they have managed it: even to the point of convincing me, a neoliberal who believes very strongly in capitalism red in tooth and claw.

FORBES: Links 10 Nov: Finally, An Occupy Wall Street Idea We Can All Get Behind, The Rolling Jubilee

The message - that capitalism, unfettered, red in tooth and claw, is always inherently good - may be the creed, but that doesn't mean it is the easiest sell in these times of resentment against Wall Street and the establishment.

BBC: It could get even nastier for Mitt Romney