短語詞組短語oxidized weightlessness 氧化失重weightlessness period 失重時期weightlessness model 失重模型weightlessness analysis 失重分析weightlessness simulation 失重模擬;模擬失重Weightlessness Countermeasures 抗失重措施Wt weightlessness 失重weightlessness principle 失重原理 返回 weightlessness