Today the most popular approach to quantum gravity is string theory, which researchers hope could describe happenings in the universe at the most fundamental level.

目前研究量子引力最常用的方法是超弦理论，研究人员希望它能描述宇宙在最基本层面上的活动。

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A new study says string theory can be tested by observing the behavior of entangled quantum particles.

一项最新研究认为，弦论能够通过观察纠缠态的量子粒子的行为表现进行检验。

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Other theories of quantum gravity, including string theory and loop quantum gravity, are far more difficult for newcomers to embrace.

量子引力的其它理论，包括弦论和圈量子引力，对新人来说都更难以涉足其中。

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In particle physics, sound-bite explanations are much harder: wave-particle duality, quantum mechanics, general relativity and string theory make good mathematical sense, or so I am told, but they generally defy translation into English.

WSJ: Matt Ridley on the Higgs Boson | Mind & Matter

This could be achieved by finding which one is right and which one is wrong, by finding that both string theory and loop quantum gravity are wrong and a third theory is right, or by finding that the two theories can be unified.

ECONOMIST: A new ��theory of everything�� is gaining ground

Extra dimensions are of interest because string theory, a class of mathematical models based on quantum theory that seeks to describe reality in the most fundamental way, requires that there be at least six of them, maybe more.

ECONOMIST: Cosmology