动物是如何应对失重的？
这就是为什么在火箭和宇宙飞船里，失重的宇航员和物体会在空中漂浮。
They are in a condition of weightlessness. And this is why, in rockets and space capsules, weightless astronauts and objects float about in the air.
当飞机以抛物线飞行并暂时抵消部分重力时，学员将能体验到近似失重的状态。
Participants undergo near-weightlessness as the plane is flown in parabolic maneuvers that create temporary reduced 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。
Living in a weightless environment does curious things to the body; after all, our entire physiology evolved in the presence of gravity.
这些令人惊讶的笔有了不起的历史，被批准在太空试用，因为它们在太空失重的情况下或以任何角度都可以轻松自如地使用。
These amazing pens have a great history of being approved for use in space, since they effortlessly write in the gravity free vacuum of space, and at any Angle.
宇航员表明上看起来是失重的，那是因为他们在不停地往地球方向做自由落体运动，而他们在水平方向上的运动又使他们保持着漂浮的状态。
Astronauts look weightless because they are in continuous freefall towards the Earth, staying aloft because of their horizontal motion.
而在几分钟的失重时间里，我们则鼓励乘客松开安全带自由飘浮。
In the few minutes of weightlessness, passengers will be encouraged to shed their seat belts and float around.
1999年，NASA(美国航空航天局)将瓢虫和蚜虫带上了航天飞机以测试它们在失重状态下的行动。
In 1999, NASA sent ladybugs and aphids up in the space shuttle to test their movements in zero gravity.
海伦描述了她身处太空时失重状态下的生活。
Helen described life in a weightless environment during her period in space.
无一例外地，这些人都体验到了失重和身体被纵向拉伸的感觉。
Uniformly, these people experienced weightlessness and the sensation that their bodies were being stretched lengthwise.
这一普遍误解的产生得归咎于“失重状态”这个词。
Blame the term "zero-gravity" for this common misconception.
科学家还不清楚高钙浓度是由于失重环境下宇航员的骨质流失还是另有其因。
Scientists do not yet know if the high calcium concentration is due to bone loss, a consequence of living in a zero-gravity environment, or other factors.
该设备模拟诸如禁闭，压力和星际旅行带来的疲劳等状态——唯一没有模拟失重状态。
The facility simulated confinement, stress and fatigue of interplanetary travel - the only thing not simulated was weightlessness.
这对来自纽约的夫妇举行的婚礼被组织方称为世界第一个失重婚礼。
The New York-based couple married in what organizers say was the world's first zero-gravity wedding.
届时，新郎诺赫和新娘艾琳将乘坐一架经特殊改装的飞机飞到11公里高空，再作15次俯冲到7.3公里高度，从而感受30秒失重状态，并在此间宣读结婚誓言。
Noah Fulmor and Erin Finnegan will exchange vows on a specially-adapted plane, which performs 15 swoops from 11km to 7.3km to allow 30 seconds of weightlessness.
电影阿波罗13号中的所有失重场景都是在这里拍摄的。
All of the zero-gravity scenes in the movie Apollo 13 were filmed during these flights.
半秒钟的失重状态，可是有代价的。
You have to pay a price for this half a second of weightlessness.
科学家们一直都知道人类在太空的失重状态下工作是很不容易的。
Scientists always knew it would not be easy for humans to work in the weightlessness of space.
“当然，我们处在失重状态，所以，你头顶的淋浴头是没有用处的，”帕耶特女士说。
"Of course, we're in weightlessness, so a shower head with water dripping on top of your head would not work," Ms. Payette says.
他热爱深海潜水，水下的失重状态和千奇百怪的生命体给了他最接近漫游外太空的感觉。
He came closest to visiting alien worlds through his love of deep-sea diving, its weightlessness and strange life forms.
游泳池能模拟国际空间站的失重状态，但不是月球的重力——地球的六分之一。
A swimming pool can simulate the weightlessness of the ISS but not the moon's gravity-one sixth of Earth's.
更重要的是，科学家们已经在排队争取这些低重力太空飞行服务的座位了，这样他们就可以在几分钟的失重状态下收集数据。
More importantly, scientists are already queuing for seats on these low-gravity space-flight services so they can collect data during a few minutes of weightlessness.
该技巧面临的挑战在于一个开发团队的开发人员的应用方法不一致，并且很容易错失重构的机会。
The challenges of this technique are that it's often inconsistently applied among developers on a team, and that it can be easy to miss opportunities for refactoring.
通常，只有在丢失重要数据时，才会认真考虑数据库的备份和恢复。
Backup and recovery of databases are often not considered seriously until vital data is lost.
如果你做出承诺太早，你就可能丧失重要的谈判的砝码，让自己处于不利的位置。
If you commit to a position too early you may give away valuable negotiating power and put yourself at a disadvantage.
这些造成飞机损毁的严重事故数十年来持续减少，但是从2006年起飞机损失重新上升了。
These serious accidents that result in the destruction of a plane have fallen steadily for decades, but have been on the rise again since 2006.
本文描述的从atom到JSON的序列化技术能够生成一个容易理解、易于使用而且能够避免丢失重要上下文数据的JSON表示。
The Atom-to-JSON serialization technique described here provides a result that is readable, usable, and avoids loss of important contextual data.
本文描述的从atom到JSON的序列化技术能够生成一个容易理解、易于使用而且能够避免丢失重要上下文数据的JSON表示。
The Atom-to-JSON serialization technique described here provides a result that is readable, usable, and avoids loss of important contextual data.
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