The cells of this cluster inside next to the fluid filled cavity is a region of the blastocyst called the inner cell mass.

而这簇细胞的内侧,毗邻于充满液体的空腔的一侧,这些细胞在囊胚中称为内群细胞

耶鲁公开课 - 生物医学工程探索课程节选

It's this - its cells in this region here, this inner cell mass that that's the source of embryonic stem cells, cells from inner cell mass here.

就是这个,在这片区域的胚胎细胞,即内细胞群,而胚胎干细胞的来源所在,就是源自这里的内细胞群

耶鲁公开课 - 生物医学工程探索课程节选

This inner cell mass develops into the embryo, which this here shown at a later stage is beginning to be clear that it's becoming an organism that looks like us.

内细胞群发育成为胎儿,这张图这是一个相对晚期的阶段,能越来越清晰地观察到,这团东西开始有个人形了

耶鲁公开课 - 生物医学工程探索课程节选

The carmakers hope to launch "the world's first affordable, mass-market fuel cell car" by 2017.

BBC: Nissan FCEV on display at a car show in Brussels in January

Within two years, consumers will be able to buy the first mass-market fuel cell.

ECONOMIST: Fuel cells meet big business

From the conventional to the unconventional, from nations seeking weapons of mass destruction to the cell of terrorists planning the next attack, from the old danger of piracy to the new threat of cyber, we must be vigilant.

WHITEHOUSE: President Obama Speaks at the Air Force Academy Commencement Ceremony | The White House