随后贝尔实验室的科学家们制造出的一个版本采用过氧化氢，并能提供数秒的空中时间。
Then scientists at Bell Labs produced a version that ran on hydrogen peroxide and provided a few seconds of lift.
随着时间的推移，羽毛变得越来越大，扑翼飞行逐渐发展，鸟类最终完全可以在空中飞行。
As feathers became larger over time, flapping flight evolved and birds finally became fully air-borne.
一些宇宙飞船在太空中停留一段时间后可能会出现问题。
Some spacecraft may have problems while in space after a certain amount of time.
当你移动得更快时，它的速度也会减慢，这意味着有一天宇航员可能会在太空中生存很长时间，以至于在遥远的将来他们才会回到地球。
It also slows down more as you move faster, which means astronauts some day may survive so long in space that they would return to an earth of the distant future.
类似的机器也曾搭乘美国宇航局的航天飞机在太空中飞行，但无法进行时间足够长的测试来证明它们是否有效。
Similar machines have flown in space aboard NASA's shuttles, but they couldn't be tested for long enough to prove whether they were effective.
直到20世纪80年代末，也就是苏联发射和平号空间站的时期，人们才开始在太空中居住更长时间。
It wasn't until the late 1980s when The Soviet Union sent the Mir space station that people began to live in space for a longer time.
然而，古人说一些星星在天空中“游荡”，随着时间的推移从不同的星座弹出。
However, the ancients noted that some stars "wandered" across the sky, popping up in different constellations over time.
那时，我远居几千英里之外，所以，那是时间的空中之旅，大堆大堆的长途话单，大量地、诗一般地运用伊妹儿。
I was living thousands of miles away at that point, so it was a time of air travel, hefty long-distance bills, and great, poetic use of email.
如果在两千英尺的空中发生动力状态下坠的话，你有足够的时间来调整恢复。
If you're settling with power at two thousand feet you've got plenty of time to recover.
这就有点像我们长时间默默地在后院吸烟时挂在空中的烟雾。
It just sort of hangs in the air as we smoke, in heavy silence, in the back yard.
在两个多星期的时间里，以色列空中力量轰炸了这个孤苦国家的每一个角落，炸死了几百平民，迫使成百上千人逃离家园。
Israel's air force has pounded every corner of that wretched country, killing hundreds of civilians and putting hundreds of thousands to flight, for more than two weeks.
通过将个人与各个地方，各个时间的人用互联网连接起来，它大大扩宽了特定时空中个人的见闻。
The Internet broadens individuals' knowledge of the particulars of time and place by keeping them connected to more places at more times.
无人机可以在空中停留30个小时之久，当飓风逐渐形成时，它可以长时间的收集数据。
The drone can stay aloft for 30 hours, plenty of time to collect data as hurricanes evolve.
现在坐高铁从柏林到汉堡仅约90分钟，而几年前空中旅行则至少需要2小时，包括办乘机手续的时间在内。
Berlin to Hamburg by rail now takes about 90 minutes, whereas a few years ago a flight would have taken at least two hours, taking check-in time into account.
你的生命只是在这广阔的时空中从你不存在到你死去的一小段时间而已。
Your life represents a tiny interlude between the vast times when you did not exist and when you will be dead.
对发生在过去的一个封闭的时间型曲线时空里的事，你不可能改变。这就类似于说，在没有封闭的时间型曲线的平常时空中，你能改变已经发生的事。
You can no more change events in your past in a space-time with closed timelike curves than you can change events that already happened in ordinary space-time, with no closed timelike curves.
光穿过只有八千分之一英寸长的试样需要七微秒，而在空间真空中，光在同样长的时间内可能会行驶一英里多。
Light takes seven microseconds to cross a sample only eight thousandths of an inch long; in the vacuum of space, light would go more than a mile in the same time.
一些无人机可以长时间的在空中盘旋。
一些重要的系统（例如空中交通控制系统或医疗系统）需要在 99.9999% 的时间里都处于运行状态。
Some critical systems, such as air traffic control or healthcare systems, are expected to be up 99.9999% of the time.
而当它们飞舞着接近地面的时候，因为空气阻力的原因，它们会在空中水平漂浮很长时间。
Air resistance then causes these crystals to lie nearly flat much of the time as they flutter to the ground.
如此短的时间里，在太空中取得的如此成就，这不是哪个国家的荣誉，而是属于全人类的。
For a brief time, the conquest of space was seen as a human triumph, not a national one.
如果你在这个时间段拍摄，你不仅会捕捉到车的光而且天空中的干扰光可以烘托照片的氛围。
If you shoot at this time you'll not only capture light from cars, but ambient light in the sky which can add atmosphere to your shots.
他自己也曾受人引诱，跟着一个女人回了家，但在无意中摸到自己的肩胛骨后，他霎时间看见了在空中挥舞白色翅膀的天使。
He himself had once been led into temptation and was going home with a woman, but having touched his scapular by chance, saw in a moment an angel waving white wings in the air.
例如，能非常简单地计算出它们向太空中释放的能量有多少通过掌握它们随时间释放的能量变化。
For example, it's easy to calculate how much energy they are pouring into the Universe by studying the way their output of energy changes with time.
（含有黑碳的云飘在空中持续的时间不长）邦德博士是观测评估黑碳模型的领导者之一，这是一项颇具雄心的实验。
Dr Bond is one of the lead authors of an ambitious attempt to assess observations and models of black carbon, and quantify their uncertainties, that should be published shortly.
（含有黑碳的云飘在空中持续的时间不长）邦德博士是观测评估黑碳模型的领导者之一，这是一项颇具雄心的实验。
Dr Bond is one of the lead authors of an ambitious attempt to assess observations and models of black carbon, and quantify their uncertainties, that should be published shortly.
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