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.
粒子を打ち込んで、穴をあけたとしても 自己修復が可能だ　固まって、穴を修復してしまう 千兆分の一秒で、まあ本当は違うんですけど、あっという間だ