另一种观点认为：暗物质颗粒同时也是自己的反粒子。
Another idea suggests that dark matter particles are their own antiparticles.
一种关于暗物质颗粒的观点认为：暗物质颗粒本身存在反粒子，这意味着它们互相接触后互相自行抵消。
One notion regarding dark matter particles suggests they have antiparticles, meaning they annihilate each other on contact.
所以关于这个观点，在它被真正确立之前，光有时候像粒子，在什么是光和什么是物质之间，有一个非常巨大的区别。
So up to this point, before it was really established that yes, light is like a particle sometimes, there was this very strong distinction between what is light and what is matter.
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