weightlessness
n. 失重
近义词：airiness，lightness，buoyancy，fluffiness，flimsiness，
英英释义
Noun
- the property of being comparatively small in weight;
"the lightness of balsa wood"
例句
用作名词(n.)
- Astronauts in flight must adjust to weightlessness.宇航员在飞行中必须适应失重状态。
- 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。