的重要性，对称性的制度相同的粒子是往往被忽视。

The importance of the symmetry in a system of identical particles is often overlooked.

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全同粒子是指质量、电荷、自旋等一些固有性质相同的粒子，它们在散射时表现出一些特别的性质。

The identical particles are the particles with inherent identical character in mass, electric charge, spin, etc.

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若用相同大小的20纳米烟尘颗粒替换铱粒子，则摄入率降低75%。

Change the 20-nanometer iridium to same-sized soot particles and the uptake rate falls by 75 percent.

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Everything -- gold, silver, diamonds, particles -- everything accelerates the same way in a gravitational field, due to this remarkable fact.

所有东西,金,银,钻石,粒子,所有东西,在引力场作用下都以相同的方式加速,原因就是这个显著的事实

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So, having other particles around that have the same energy that you could technically add up if you were adding them up like a wave, you can't do the same thing with particles, they're all separate.

所以，如果它们是波,你可以把其他的,拥有相同能量的粒子加起来，但是你不能把这些粒子加起来，因为它们是分离的。

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