Astronauts in flight must adjust to weightlessness.宇航员在飞行中得适应失重状态.Objective To observe bone mass changes during convalescence after simulated weightlessness.目的观察模拟失重恢复期骨质的变化.To apply engineering Methods : To the study of...
The mean man grudged the food his horse ate.那个吝啬鬼舍不得喂马.He grudged the food his horse ate.他吝惜马料.But Hooper, my newest - joined platoon leader , grudged them their life of privilege.但是, 我们最近来的排长胡珀, 嫉妒那些人舒服生活....