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.
这种观点的麻烦是暗物质粒子需要比多数理论预计的质量要小得多。
The trouble with this idea, however, was that the dark matter particles needed to be much less massive than most theories were predicting.
这种观点的麻烦是暗物质粒子需要比多数理论预计的质量要小得多。
The trouble with this idea, however, was that the dark matter particles needed to be much less massive than most theories were predicting.
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