weight hourly space velocity

例句：

1. 1. The weight hourly space velocity of the satellite is 0.2 km/s.
   卫星的每小时重量空间速度为0.2公里/秒。
2. 2. The research team found that the weight hourly space velocity of the material was significantly higher than expected.
   研究小组发现，材料的每小时重量空间速度远高于预期。
3. 3. The weight hourly space velocity is a key factor in determining the efficiency of a spacecraft's propulsion system.
   每小时重量空间速度是决定航天器推进系统效率的关键因素。