Let's take the now extinct American cheetah, for instance.

让我们以现在已经灭绝的美洲猎豹为例。

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For example, Peter Sheldon' s studies of trilobites, a now extinct marine animal with a segmented body, offer a detailed glimpse into three million years of evolution in one marine environment.

例如，彼得·谢尔登对于三叶虫的研究，那是一种已灭绝的身体分节的海洋生物，他的研究让我们得以一窥三百万年以来一个海洋环境的进化过程。

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The group of now extinct humans known as Neanderthals did not leave clear evidence of being musical.

VOA: special.2009.08.18

The dingo has been implicated in driving the now extinct Tasmanian "tiger" - or thylacine - off mainland Australia, and marginalising it in its final island habitat.

BBC: NEWS | Science/Nature | Dingo's origins tracked by DNA

The extinction of the personality of a state results traditionally in an abrogation of all political and military treaties concluded between the now extinct entity and other states.

CENTERFORSECURITYPOLICY: Center For Security Policy

Though foxes are of recent introduction in Australia (having been brought for sport by British settlers), many marsupial predators, now extinct, were present before the arrival of man in both his Aboriginal and his European forms, so the ecological system of plants, herbivores and carnivores in the eucalyptus forests would probably not have been that different in the evolutionary past.

ECONOMIST: Ecology raids the techniques of chemistry