Time spent in zero G changes the body: Astronauts come home with bone loss and weakness. But what happens in their heads?

失重会改变身体：宇航员回家时会有骨质流失和肌肉无力的感觉，但是他们的大脑里会发生什么呢？

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With the crew aboard the International Space Station packing up Endeavour for its return flight to Earth, several astronauts reflected on life in zero-G.

奋进号上的人员和国际空间站的所有人一起检查并确保其返回地球的飞行，几个宇航员对零重力生活有了体验。

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Can a child be conceived in zero-G?

零重力环境下能怀上孩子吗？

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And if delta G is greater than zero, then it goes spontaneously in the other direction.

如果dG大于零会怎样，那体系会向着反方向自发转变。

麻省理工公开课 - 热力学与动力学课程节选

When delta G is zero, you know, it doesn't mean that you've got all of one side, all reactants and zero products or all products and zero reactants.

当dG等于零的时候，化学反应并不处在任何一边，例如全部都是反应物没有生成物,或者全部都是生成物而没有反应物。

麻省理工公开课 - 热力学与动力学课程节选

If delta G equals zero, then we're already in equilibrium.

如果dG等于零，我们就处于平衡态。

麻省理工公开课 - 热力学与动力学课程节选

"Zero G, and I feel fine, " Glenn called from orbit, paraphrasing himself from 36 years earlier.

CNN: Victory Lap

Unidentified Man: Welcome to Zero G Aerospace, making space travel available to everyone.

NPR: Tech Tycoons' Dream: My Own Private Spaceship

And so, inside the elevator, the human party continues oblivious, the riders flirt and complain and mix zero-G cocktails, or chase bewildered zero-G leaf-cutter bees.

NEWYORKER: Lostronaut