现在研究人员认为他们至少知道了一些在早期发育中对形态起决定作用的分子。
Now investigators think they know at least some of the molecules that act as morphogenetic determinants in early development.
回来后,他将实验室里的研究课题转向了脑脊液如何滋养发发育中的神经系统。
When he got back, he switched labs to study how cerebrospinal fluid nourishes the developing nervous system.
最成功的陆生植物群体是那些进化出了受精性细胞散布方法的群体,这些方法不依赖于水和防止发育中的胚胎干涸的结构。
The most successful groups of land plants are those that evolved methods of fertilized sex cell dispersal that are independent of water and structures that protest developing embryos from drying out.
What's shown in this diagram is the progress of the developing embryo as it travels in time, down the fallopian tube.
这张图上显示的,就是胚胎发育的过程,是按照它在输卵管中移动的时间排序的
These are cells that I that were obtained either from a more developed embryo, past the blastocyst stage.
这些细胞是我从,发育的更成熟的一些胚胎中提取的,这些胚胎已经过了囊胚期了
This process of cell proliferation or cell division is, of course, very important during development of an embryo.
细胞增殖和分裂的过程,在胚胎发育中至关重要
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