身体发育是先天遗传和后天环境中各种因素相互作用的结果。
格塞尔认为婴幼儿的行为主要有两大类, 一是身体发育(physical development) , 如俯卧、 坐、 站、 走、抓、 捏等; 另一是智能发育(mental development) , 如微笑、 视、 听、 简单的对事物的分析-综合...
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他们的身体发育良好,极其健康。
你可能还记得,同龄人类婴儿的身体发育不如其他哺乳动物。
You probably remember that human infants are less developed physically than other mammals of the same age.
当你的孩子身体发育成熟时,你将知道会发生什么。
You will learn what to expect as your child matures physically.
The other one is a committed progenitor cell that now somehow has been changed in such a way that it's going to mature and develop into non-stem cells or the cells that make up our bodies, somatic cells.
而另一个子细胞就通过某种变化,成了定向的祖细胞,并将成熟和发育为非干细胞的细胞,就是构成我们身体的细胞,体细胞
You can see this region here is going to develop into one of the upper limbs, the arms here and the back is different from the front, the spinal cord is developing in the back, whereas, the structures that become our intestinal tract is developing on the other surface.
你能看到这个区域,将会发育成为上肢,这里是手臂,而且身体前后也有不同,脊椎正在后背发育,另外,会成为我们肠管的结构,也在另一个表面发育着
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