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。
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.
这些差异之处，尤其是微重力环境，已经被证明会增加身体负担，导致骨质疏松、肌肉松弛、心血管功能紊乱、前庭觉出现变化。
These variables, particularly microgravity, have been shown to put added stress on the body, leading to bone loss, muscle loss, cardiovascular deconditioning and vestibular changes.
佝偻病 会导致骨头疼痛疏松、牙齿问题和肌肉松弛。
Rickets can cause bone pain and weakness, teeth problems and muscle loss.
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