It's self-inspired. Diatomic structures, radiolaria, the things that we couldn't see but we can do now -- these, again, are cored out. They're made virtually from nothing. They're made from silica.
這是自我 -- 自我启发的。双原子结构、放射虫， 我们以往看不到的东西，但是我们现在能够做到。 这些又都是空心的。它们几乎不耗什么材料。