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。
It's a bit like being weightless.
这有点像在无重力状态下。
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？
Photons have no mass - they are weightless.
光子没有质量——它们是无重的。
They are not weightless, they are climbing up.
他们还有重量，此时飞机在爬升。
We feel weightless when the elevator descends.
当电梯下降时，我们会感到失重。
The fly cannot do this, as it is essentially weightless.
苍蝇做不到这一点，因为它是失重。
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。
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。
It was weightless in the beginning, if there was any, and is still the same.
这是在失重的开始，如果有任何，并仍是相同的。
It is a weightless technological mini-wonder you can wear with comfort anywhere.
它是一个轻与鸿毛且能随意佩戴的微型技术奇迹。
It is a weightless technological mini-wonder you can wear with comfort anywhere.
它是一个轻与鸿毛且能随意佩戴的微型技术奇迹。
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