Muscle-strengthening activities help build and strengthen muscle groups in the body.
VOA: special.2011.06.28
And then we'll talk about how you can build something to replace a complicated small part in the body like that.
然后我们再讨论工程师们如何构建,能够取代体内如此精细小巧器官的东西
There can be a supply of them, a storehouse of them that can build up in the body, and so day-to-day fluctuations become less of a problem with fat soluble then water soluble vitamins, because the body can go grab them from a storage depot, if you will.
从而在体内建立起一个供应源,一个脂溶性维生素仓库,这样一来,相比起水溶性维生素,脂溶性维生素的浓度不会每天剧烈波动,因为机体可以任意取用体内的储存
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