prolonged space flight meaning in English

长时期航天

With the development of space exploration projects , the atrophy and decreased function in antigravity skeletal muscles are one of major problems that need to be solved for the prolonged space flight . to understand the features of decreased contractile function and increased fatigability in unloaded hindlimb skeletal muscles will help to develop effective countermeasures during space flight , and contribute to the prevention and treatment of skeletal muscle atrophy in long - term bed - rest patients
随着载人航天活动的发展，航天飞行时间越来越长，抗重力肌废用性萎缩引起的强直收缩疲劳性增加，使航天员运动易疲劳的感觉更加明显，限制了飞行时间和工作效率，在应急逃生时肌肉发生损伤的可能性增大，且影响返回地面重力环境后的再适应能力。