People who have anorexia or bulimia are at risk of bone loss.

患有厌食症和食欲过盛的人处于骨质流失的风险中。

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Most people have enough bone to start with, so the bone loss of aging is not a big problem.

大多数人都有足够的骨质，所以随着年龄增长的骨质流失不会导致太大问题。

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In space, astronauts are susceptible to bone loss, which can lead to fractures or breaks.

在太空，宇航员比较容易受到骨质流失的影响，这将会导致骨头的粉碎或折断。

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Also on board is a new exercise machine, which is part of ongoing studies into the effects of long-term space flight on muscle and bone loss in astronauts.

VOA: standard.2010.04.05

Nor did the supplements reduce the aging-related bone loss that can lead to osteoporosis, the study found.

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Living in a zero-gravity environment poses risk of nutrient deficiency and bone loss, so keeping close tabs on food intake in space is crucial.

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