维生素D可增强骨骼和肌肉骨骼系统。
该卫生局表示，人类需要补充这些营养来增强骨骼和肌肉的健康。
These, it says, should be taken for improved bone and muscle health.
跑步能增强你的心脏和肌肉功能，但反过来也可能损伤你的膝盖和脚部骨骼。
Running can strengthen your heart and muscles, but conversely, it can also damage your knees and the bones in your feet.
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