Microgravity sex is a topic of immense interest to teenage fanboys and scientists alike .

微重力下的性爱不仅让青少年浮想联翩，科学家对此也饶有兴趣。

A 1998 columbia flight showed that rats born in microgravity have no sense of up and down .

1998年哥伦比亚号的一次飞行证明在微重力环境下出生的老鼠没有感知“上下”方位的能力。

This is compounded by the fact that long exposures to microgravity have been shown to exacerbate presbyopia in astronauts .

雪上加霜的是，长时间曝光于微重力之下已被证实会加剧宇航员的老花眼。

That nikon 800mm f / 5.6 lens weighs 12 pounds here on earth , but in microgravity , it 's considerably easier to wield .

尼康800mmf/5.6镜头在地球上重达12镑，但是在微重力条件下，握持它却要容易得多。

Space station crews returning to earth show that we also suffer severe muscle loss in microgravity - possibly enough to make it impossible for women to give birth naturally in space .

太空站机组成员回到地球后，表明人们的肌肉在微重力状态下也会受到了严重的损失可能会使妇女在太空中不能自然分娩。