weightlessness是什么意思 音标: 英 ['wetlsns] 美 ['wetlsns] [化] 失重[医] 失重[状态] n the property of being comparatively small in weight weightlessness的用法和例句： 1. Not to brag, but I'm an astronaut, so I've been weightless before. 不是吹牛 但我是宇...
