These reactions influence how our genetic code is expressed: how each gene is strengthened or weakened, even turned on or off, to build our bones, brains and all the other parts of our bodies.

这些反应影响着我们的遗传密码的表现方式：每个基因是如何被加强或削弱，甚至其作用机制是如何被打开或关闭，从而构成我们的骨骼、大脑以及身体的其他部位的。

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One thing that physiologists have learned is that without gravity our bodies begin to lose strength, leaving astronauts with weakened bones, muscles and cardiovascular systems.

生理学家发现，失去重力后身体会失去力量，这使得宇航员骨质疏松、肌肉松弛，心血管功能也相应退化。

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This ritual involves pushing the bodies into the tight Spaces of the coffins, and often bones are cracked and broken as the process is completed.

礼制包括将尸体推入棺木狭小的空间，而且通常在仪式完成之时，骨头也会破裂和折断。

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"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