The astronauts are conducting a series of experiments to learn more about how the body adapts to weightlessness.
那些宇航员正在进行一系列实验，以便更多地了解人体如何适应失重状态。
《柯林斯英汉双解大词典》
2
Uniformly, these people experienced weightlessness and the sensation that their bodies were being stretched lengthwise.
无一例外地，这些人都体验到了失重和身体被纵向拉伸的感觉。
3
More importantly, scientists are already queuing for seats on these low-gravity space-flight services so they can collect data during a few minutes of weightlessness.