One theory is that they were hunted to extinction by humans.

一种理论是，它们是由于人类的猎杀而灭绝的。

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Then he came up with a scenario that combined some hunting by humans with some environmental stress.

然后他提出了一个结合人类捕猎和环境压力的场景。

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These fish and snails have themselves experienced a decline in population because of overfishing by humans.

由于人类的过度捕捞，这些鱼和蜗牛的数量已经有所下降了。

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Earthenware is one of the earliest kinds of clay used by humans.

VOA: special.2009.09.09

So there are two components integral and inseparable in the concept of holiness: initial assignment of holy status by God and establishment of rules to preserve that holy status, and secondly, actualization of that holiness by humans through the observance of the commandments and rules that mark that thing off as holy.

因此在神圣这一概念中，有两个组成部分,一个是上帝最初形成的神圣状态,和为了保持这个神圣状态而建立的规则制度，第二个是，人们通过遵守戒律,而将神圣现实化到生活中,将神圣的事物标记出来。

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it's happening. And I think it's happening, I think it's being sped up by humans, by our interaction.

这是一个正在发生的事实，由于人类的活动，这个进程在加速。

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Their numbers are dwindling due to poaching and the destruction of their habitats by humans.

BBC: Elephants killed by speeding train in India

There have also been studies into other causes of bird deaths caused indirectly by humans.

BBC: How many birds are killed by windows?

"It is a game of mistakes played by humans who are flawed, " he says.

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