translation.en: One other thing I want to quickly mention is that many of the scaffolds we make are porous, and they have to be, because you want blood vessels to grow in there.
translation.zh: 另外一个我想很快地提一下， 就是我们做的很多支架都是多孔的，这是必须的， 因为你得让血管在里面发育生长。