One of NASA's current projects involves cutting down on sodium levels in space food.
NASA目前的一个项目就是削减太空食品中的钠含量。
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If the source of Enceladus' south polar geysers, discovered by Cassini in 2005, is indeed liquid water, then the geysers will transport the dissolved sodium into space.
A related study is under way to determine the role of salt in bone loss, which is particularly relevant because the space station's pantry is stocked with foods very high in sodium.