Helen described life in a weightless environment during her period in space.
海伦描述了她身处太空时失重状态下的生活。
Photons have no mass – they are weightless.
光子没有质量——它们是没有重量的。
一切都没有重量。
We're all weightless during half a second.
这半秒内，一切物体都失重了。
How can I show you that we are weightless?
那么怎么证明没有重量呢？
It's a bit like being weightless.
这有点像在无重力状态下。
Photons have no mass - they are weightless.
光子没有质量——它们是无重的。
We feel weightless when the elevator descends.
当电梯下降时，我们会感到失重。
Knowledge is weightless, a treasure you can always carry easily.
知识没有重量，它是可以随身携带的珍宝。
Knowledge is weightless, a treasure you can always carry easily.
知识是一种无重的、可以轻易携带的珍宝。
Knowledge is weightless, a treasure you can always carry easily.
知识没有重量，它是你可以轻松携带的珍宝。
Knowledge is weightless: a treasure you can always carry easily.
知识是没有重量的，是你可以永远携带的财宝。
Knowledge is weightless: a treasure you can always carry easily.
知识是没有重量的，是你可以永远携带的财宝。
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