weightlessness physiological effects

例句：

1. 1. The astronautsexperienced weightlessness during the spacewalk.
   宇航员在太空行走时体验到了失重。
2. 2.The weightlessness of the new technology makesit easier to use.
   新技术的失重特性使得使用起来更加方便。
3. 3. The weightlessness of the moon is a fascinating phenomenon.
   月球的失重现象是一个引人入胜的现象。