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Finally, in 1926, Heisenberg came up with a celebrated compromise, producing a new discipline that came to be known as quantum mechanics. At the heart of it was Heisenberg's Uncertainty Principle, which states that the electron is a particle but a particle that can be described in terms of waves.
1926年，海森伯终于想出个极好的妥协办法，提出了一种后来被称之为量子力学的新理论。该理论的核心是“海森伯测不准原理”。它认为，电子是一种粒子，不过是一种可以用波来描述的粒子。
The uncertainty around which the theory is built is that we can know the path an electron takes as it moves through a space or we can know where it is at a given instant, but we cannot know both. Any attempt to measure one will unavoidably disturb the other. This isn't a matter of simply needing more precise instruments; it is an immutable property of the universe.
作为建立该理论基础的“测不准原理”认为，我们可以知道电子穿越空间所经过的路径，我们也可以知道电子在某个特定时刻的位置，但我们无法两者都知道。任何想要测定其中之一的努力，势必会干扰其中之二。这不是个需要更精密的仪器的简单问题；这是宇宙的一种不可改变的特性。
