One questions that bury the humans heart is: how long these energies like petrol, coal and gas could last to produce the electricity.

但是电也是需要生产，要生产电就需要大量的燃料，如石油、煤、天然气等。今天人们担心的问题是：这些燃料能维持多久？这一点谁也无法确知。

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Humans are asymmetric animals. Early in our embryonic development, the heart turns to the left. The liver develops on the right. The left and right lungs have distinct structure.

人类是不对称的动物，在我们胚胎发育的早期，心脏就转向了左边，肺则往右长，而且左、右肺具有完全不同的结构。

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The heart of their argument is that humans are social animals and that in highly unequal societies those at the bottom suffer from a range of pathologies.

他们的中心论点是人类是具有社会性的动物，在高度不公平的社会中那些处在社会底层的人们遭受着病理疾病的折磨。

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If this or a similar strategy is effective in humans, it could mean fewer heart attacks and could also make bypass surgeries a thing of the past.

FORBES: Could Bypass Surgeries Become a Thing of the Past?

The agency also wants its sensor to identify individual humans using electrocardiography, which traces the heart's electrical activity.

ENGADGET: DARPA to develop biometric sensor capable of seeing through walls, pulling your heartstrings

In humans they sit on nerve cells throughout the body--in the brain, heart and stomach and on skeletal muscle.

FORBES: Magazine Article