In quantum field theory, the vacuum is not empty but a sea of virtual particles.
在量子场论中，真空并非空无一物，而是充满了虚粒子。
魔鬼不需要长角才危险。
History is not just the story of bad people doing bad things. It's also the story of good people doing nothing.
我不喜欢害怕，我喜欢无所畏惧。