weightlessness

n.

无重状态；失重；

1. Astronauts in flight must adjust to weightlessness.
   宇航员在飞行中必须适应失重状态。
2. When a sportsman rises high into the air and an astronaut travels around the orbit, they will be in weightlessness.
   运动员的腾空和宇航员在轨道上的飞行都是处于失重状态。

Prolonged weightlessness and calcium loss in man
Adaptation of postural control to weightlessness.
Spatial orientation in weightlessness and readaptation to earth's gravity
Skeletal response to simulated weightlessness: a comparison of suspension techniques
A MODIFIED TAIL-SUSPENSION MODEL FOR SIMULATING LONG-TERM WEIGHTLESSNESS
Osteocyte apoptosis is induced by weightlessness in mice and precedes osteoclast recruitment and bone loss
Spaceflight and Bone Turnover: Correlation with a New Rat Model of Weightlessness
Changes in markers of bone formation and resorption in a bed rest model of weightlessness.
M.I.T./Canadian vestibular experiments on the Spacelab-1 mission: 1. Sensory adaptation to weightlessness and readaptation to one-g:...
M.I.T./Canadian vestibular experiments on the Spacelab-1 mission: 1. Sensory adaptation to weightlessness and readaptation to one-g:...