These usually shoot well, but they have a downside: they are now several times heavier than what we expect to hit, and the particles themselves very in size from nanometers up to microns.

• 它们的射击性能通常都不错，但是它们也有不好的一面：它们是我们期望射击重量的数倍，并且颗粒自身的大小从纳米到微米都有。