Today we are witnessing a sixth mass extinction, but unlike the others, the current loss of bio-diversity can be traced to human activity.

今天，我们正在见证第六次物种大灭绝，但与其它几次不同的是，目前生物多样性的丧失可以追溯到人类活动。

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Loss of neurofibromin expression in NF1-associated tumors is associated with elevated RAS activity and increased cell proliferation.

在与 NF1 相关的肿瘤中神经纤维蛋白表达的丧失与 RAS 活性升高和细胞增殖增加有关。

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Russell Poldrack, who runs a cognitive neuroscience lab at the University of Texas at Austin, has found that activity in the ventromedial prefrontal cortex depends on a person's attitude to loss.

拉塞尔波特拉克在奥斯丁的德克萨斯州大学经营了一个认知能力的神经科实验室，他发现脑前叶腹部皮层的活动取决于一个人对待损失的态度。

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Laura Middleton says the research showed that even low-intensity activity reduced the risk of thinking problems and memory loss.

VOA: special.2011.07.27

Some estimates suggest species extinction because of human activity is about 1,000 times faster than the natural rate of loss.

VOA: standard.2010.01.31

"If we do not do this kind of stimulus, the deficit will get worse because of the loss of economic activity, " Frank told CNBC when asked whether this kind of spending will just blow a hole in the already ballooning deficit.

NPR: Fed Helps Money Markets As Credit Stabilizes

South Africa's unemployment rate stands at 40% (by unofficial measuring), which makes all the more painful such a significant loss of entrepreneurial activity.

ECONOMIST: A look at noteworthy articles from business journals

Work carried out by the University of Dundee, in Scotland, revealed that if the pesticides were applied directly to the brains of the pollinators, they caused a loss of brain activity.

BBC: Neonicotinoid pesticides 'damage brains of bees'