1·Living in a weightless environment does curious things to the body; after all, our entire physiology evolved in the presence of gravity.
在失重的环境下生存会让我们的身体产生奇怪的现象；我们的整个生理机能毕竟还是以重力为前提的。
2·Butterflies are unlikely—it is not like hitting turbulence in a plane—because your stomach falls at the same speed as the rest of you, but you feel weightless and time slows.
不断追逐快乐的人只有亲身体验，因为你的志趣只有你的身体下坠才可体会---这可不象飞机在冲击湍流而你只是坐在飞机里那样安稳，但你感觉到失重和时间缓缓流逝。
3·To recreate the weightless experience without going into space, the plane executed parabolic flight maneuvers, climbing sharply and descending several times during the one-hour flight.
为了不上太空而体验失重，飞机进行了“过山车”式的俯冲，在一小时的飞行期间，迅速爬升和下降。
4·However, if you could jump up way - near the top of the atmosphere — - where the air drag is negligible — then you would be weightless for quite some time.
而且由于空气阻力，不可能完全失重-，不过如果十分接近大气层顶端-，那么空气阻力便可以忽略。
5·If I jump off the table I will be weightless for about half a second.
如果我从桌子上跳下来，我也有大约0。5秒的失重。
1·The antiprotons in this scheme would be gathered into a vast fuel tank, a nearly weightless cloud hundreds of meters long surrounding the craft.
在这一计划中，反质子被收集起来装进一个巨大的燃料箱，该燃料箱实际上就是环绕在飞船周围长达几百米的无重量云团。
2·The ballet stage is a bright, seemingly weightless world where gravity is continually being ------- by the dancers.
芭蕾舞台是一个明亮的，看起来无重量的世界，在那里重力一直被演员（）。