translation.en: This is actually a heart valve that we've engineered, and you can see here, we have the structure of the heart valve and we've seeded that with cells, and then we exercise it.
translation.zh: 这里是我们作出的 真的心脏瓣膜。 你能看到我们先有了瓣膜的框架， 再把细胞种上去， 然后让它锻炼锻炼。