Medulloblastomas originate from embryonic stem cells and they tend to be extremely aggressive.

髓母细胞瘤来源于胚胎干细胞，它们往往极具侵袭性。

So I've studied a lot about stem cells embryonic stem cells are particularly powerful.

我对干细胞研究很多, 胚胎干细胞尤其强大。

Campaigners hope the developed embryonic cells can repair damaged tissues and cure diseases. James Gallagher has more.

支持者希望发达胚胎细胞能修复受损组织并治愈疾病。詹姆斯·加拉赫报道。

Japanese researchers have grown teeth and even organs with embryonic stem cells from rats and mice.

日本研究人员已经利用老鼠和小鼠的胚胎干细胞培育出了牙齿和胰腺、肾脏等器官。

Surgeons in London have used human embryonic stem cells in a pioneering attempt to cure blindness.

伦敦外科医生利用人类胚胎干细胞治愈失明。

Gastrulation is a vital development stage in which embryonic cells become primed to form different organs and tissues.

原肠胚形成是一个至关重要的发育阶段，胚胎细胞在此期间准备好形成不同的器官和组织。

These are regular skin, fat, liver, or other cells that scientists have changed to behave like embryonic stem cells.

这些细胞可以是普通的表皮、脂肪、肝或者其他种类的细胞，而科学家们已经能够将它们转变为具有胚胎干细胞功能的细胞。

Geron, just last year, started the first trial using human embryonic stem cells to treat spinal cord injuries.

杰龙去年开始第一次尝试用人类的胚胎干细胞治疗脊髓疾病。

Until now, two kinds of stem cells of human sources have been known: embryonic stem cells and adult stem cells.

目前已知的人类干细胞有两种：胚胎干细胞和成体干细胞。

So we started with a set of nearly 50 different specifications that we generated from experimental observations of embryonic stem cells.

我们从一套大约有 50 个不同的技术规范开始，这些是我们从对 ES 细胞的实验观察值中得出的。