建造“麦斯威尔妖”的现实生活版本——它可以把信息转变为有用的能量——意味着未来的毫微级计算机可能纯粹地依靠信息来作为动力。

The building of a real-life version of "Maxwell's demon" – which can turn information into useful energy – might mean that future nanomachines can be powered purely by information.

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例如百吉饼或许尝起来不咸，但一块普普通通的4英寸(10厘米)大的燕麦百吉饼却含将近532毫克的钠，而且即便一小块全麦面包也有132毫克钠。

For example, you may not think a bagel tastes salty, but a typical 4-inch (10-centimeter) oat-bran bagel has about 532 mg of sodium, and even a slice of whole-wheat bread contains 132 mg of sodium.

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