Nitrogen is a major element in the proteins in our bodies.
VOA: special.2011.04.05
In fact, of all the systems of cellular differentiation that are known in our bodies, probably hematopoiesis is the best known.
事实上,我们体内已知的,所有由细胞分化成的系统中,造血系统也许是最为人所熟知的
Because it was in the 1950's or so, maybe the late 1940's, that people started to discover lithium, even though it had no natural function, it did do something in our bodies.
因为在二十世纪五十年代左右,可能是四十年代末期,人们开始发现锂,尽管不参与人体的正常生理活动,但是它确实会对我们的身体产生影响。
"What we've now learned is that fat is not just a deposit for energy in our bodies."
VOA: standard.2010.02.23
Because that's the temperature at which many of the molecules in our bodies operate at their most efficient, and enzymes is the best example of that.
因为在正常体温下,体内许多分子活性最高,酶就是其中最好的例子
"Vitamin D has become a very hot topic in medicine now as we are discovering very high levels of vitamin D deficiency in our population, not only in the U.S.,but worldwide" Vitamin D helps our bodies absorb calcium and helps form and maintain strong bones.
VOA: standard.2010.05.28
And Descartes said, "Boy, these machines respond in certain ways to certain actions so machines can do certain things," and in fact, he says, "Our bodies work that way too.
因此笛卡尔说,"天呐,这些机器可以对特定的动作,做出特定的反应,原来机器也是可以完成某些动作的",实际上,他说道,"我们的身体也是这样运作的
Insulin is a naturally occurring hormone, it's a protein hormone that circulates in all of our bodies and regulates glucose metabolism.
胰岛素是人体自身产生的一种激素,它是一种蛋白质激素,遍布全身,并调节糖代谢
What happens in the intestine is that food gets broken down into constituent molecules, some of those molecules are absorbed into our bodies.
在肠道中,食物必须分解成基本的组成分子,其中一些分子才能被我们的身体吸收
Our bodies have mechanisms like that, that mainly use the principle of negative feedback in order to control the parameters that are important for life within a certain range.
我们的身体有着与之类似的机制,主要依靠负反馈原理来,将与生命息息相关的指标控制在一定范围
Because the cells are the fundamental component of our bodies; very interesting because all of our cells in our body share many characteristics and some of those characteristics are shown on this picture.
因为细胞是我们身体的基本构成单位,这非常有意思,因为我们身体里所有细胞,有许多共同的特征,而其中的一些特征展示在了这幅图中
in spite of the fact that we take a variety of chemicals into our bodies in different ways and we have to do that to stay alive, but we have mechanisms to control this very well.
尽管事实是我们从不同途径,摄入各种化学物质以维持生存,但我们能够很好地控制它们在体内的总量
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