![Manypeopledreamoftravelingintoouterspace．However，spend...]( "Manypeopledreamoftravelingintoouterspace．However，spend...")
- 问题详情： Manypeopledreamoftravelingintoouterspace．However，spendingtoomuchtimeinspacemaycausehealthproblems，accordingtoNASA．That'swhyastronautsshouldn'tspendmorethansixmonthsontheInternationalSpaceStation（ISS）atatime． Muscle（肌肉）andboneloss Inaweight...
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