If you shoot a particle at them and knock a hole in them, they repair themselves; they go zip and they repair the hole in femtoseconds, which is not -- is really quick.
如果你用一个颗粒物质在它们表面上射一个洞， 它们会进行自我修复。它们会在几个飞秒之内 完成修复，即便不是飞秒，那速度也够快的