Part of the problem with unifying gravity and quantum mechanics is what happens to gravity at small scales.

统一引力和量子力学的困难之一是极小尺度下的引力是会是怎样。

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This works well at small scales (basically, as long as the problem is small enough to fit inside your head) but doesn't scale much beyond that.

这在小范围内可以很好地运行(基本上，只要这个问题小到您用脑子想想就可以解决)，但是不能超出太多。

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He describes this phenomenon as a signature of the fuzziness, or uncertainty, of the quantum sphere, and also as resulting from fractal behavior at small scales.

他将这种显现视为量子球模糊性或不确定性的信号，并认为这是在小尺度下发生分形行为的结果。

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His main characters include G, the strength of gravity, h, Planck's constant, which governs the quantum nature of reality at small scales, e, the charge of the electron, and c, the speed of light itself.

ECONOMIST: Modern physics

At such small scales, the behaviour of molecules depends on their size.

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"The physics of flight at such small scales is relatively poorly understood which makes designing small flying systems very difficult, " he told BBC News, adding that biological systems provided "critical insights into designing our own artificial flyers".

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