"Only when the Tooth Fairy buys the lost tooth from us, can we grow a new tooth." Logan nodded.
“只有牙仙把掉的牙买回来，我们才能长出一颗新牙。”洛根点了点头。
They could be employed, Mr Murphy suggests, to place liver cells on a pre-built, liver-shaped scaffold or to form layers of lining and connective tissue that would grow into a tooth.
根据墨菲先生的说法，它能被用来将肝细胞放置到一个有着肝形状的支撑上，或者是形成牙齿所需的层状结构及链接组织。
First touch, Scared. Actually the most in the gums grow inside a tooth on the gums. When there is a long hard meat, and finally forming today.
一摸。居然在上牙龈的最里面的牙床上长出一块牙齿。很早的时候那里只是一块硬肉，终于在今天成型。
Mother: I think it is about to drop away. A new tooth is going to grow out soon.
妈妈：我想它是要掉了，新的牙很快就要长出来了。
Because embryonic stem cells are so immature, it is very difficult to control what kinds of cells they produce, and the fear is that a tooth could grow inside a heart, for instance.
因为胚胎干细胞没有完全成熟，它很难控制他们将来的类型，比如害怕在心脏旁边长一颗牙齿。
Parents toss a lost bottom tooth up to the rooftops, so that the new tooth will grow upwards, too.
父母将孩子下牙床的掉牙扔上屋顶，这样新牙才会向上长。
Parents toss a lost bottom tooth up to the rooftops, so that the new tooth will grow upwards, too.
父母将孩子下牙床的掉牙扔上屋顶，这样新牙才会向上长。
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