长征二号火箭以每一秒钟11.2千米的速度将卫星发射到太空。
The Long March No. 2 Rocket sent up the satellite into space at the speed of 11.2 kilometers per second.
而航行者1号是速度最快的，正以约每秒17千米的速度脱离太阳系。
Voyager 1 is moving the fastest though, escaping the solar system at about 17 kilometers per second.
事实上我们有很多轨道垃圾，以每小时10-20千米的速度运行。
The truth is we do have a lot of debris, and travelling at 10 to 20 thousand miles an hour.
熔岩顺着山体陡峭的一面以每小时100千米的速度迅速流泻出熔岩湖。
Runny lava flowed down its steep sides at rates of nearly 100 km per hour, quickly draining the lake.
卫星以11.2千米每秒的速度前进可以脱离地球引力，这被称为“逃逸速度”。
Eleven point two kilometers per second, at which satellites can be freed from the gravitation of the earth, is called "escape speed".
他说，上海将轨道交通的速度限制在每小时45千米(合每小时28英里)，并且将成立委员会调查此事件。
Shanghai is limiting train speed to 45 kilometers an hour (28 miles per hour), and will form a committee to investigate the accident, he said.
这条线路上火车的最高运行速度是300千米每小时(186英里每小时)。
The top operational speed for the line's trains is 300 kilometers per hour (186 MPH).
奋进号在离开地球350千米的高空中环绕着，当它以每小时27 000英里的速度急速穿过地球的阴影时，它打开了负载舱的灯光。
Orbiting 350 kilometers above planet Earth, Endeavour's payload bay is lit up as it hurtles through Earth's shadow at 27, 000 miles per hour.
地球在轨道里的速度，约为30千米每秒。
The velocity of the Earth in orbit is about 30 kilometers per second.
自那以后环法的比赛路程缓慢下降，但冠军的速度却不断上升，达到每小时40千米。
Since then the length of the Tour has fallen steadily but the average speed of the winner has risen to around 40km/h.
他告诉记者，磁北极每年以50千米(约30英里)的速度移动，如今科学家使用人造卫星追踪磁极移动的轨迹。
He told us that magnetic north is moving at a speed of 50 kilometers - about 30 miles - every year. He said that scientists nowadays use satellites to track the changes.
美国国家航空和航天局的太阳力学天文观测台称，有一股强大的与耀斑引起的日冕物质抛射大约以每秒560英里（每秒900千米）的速度向地球袭来。
NASA's Solar Dynamics Observatory said it saw a large coronal mass ejection (CME) associated with the flash blasting toward Earth at about 560 miles per second (900 kilometers per second).
门槛跑一般是以比5千米或10千米配速稍慢一些速度跑，但是比半程马拉松的速度要快。
Tempo runs should be done slower than 5k or 10k pace, but faster than half marathon pace.
在几千米外，主弹头分成几十个小弹头，然后从亚音速状态下加速到大约三倍音速的速度。
the warhead separates a few dozen kilometres away and then accelerates from almost the speed of sound to about three times as fast.
2007年，科学家们记录了一只黑尾豫在九天之内以平均每小时35英里(56千米)的速度从阿拉斯加飞到了新西兰，飞行里程超过7000英里(11500千米)。
In 2007 scientists recorded a godwit flying more than 7, 000 miles (11, 500 kilometers), from Alaska to New Zealand, in nine days at an average speed of about 35 miles an hour (56 kilometers an hour).
它们以平均每小时60英里(97千米)的速度完成了长达4200英里(6760千米)的旅程。
The birds traveled up to 4, 200 miles (6, 760 kilometers) at an average speed of 60 miles (97 kilometers) an hour.
往北飞的鹅很典型地在七到八小时内以64.5千米/小时的速度从海平面升高到6000米高空。
The northbound geese typically made the trip from sea level over mountain passes of up to 6000 meters in just 7 or 8 hours at speeds of 64.5 kilometers per hour.
每颗失控的行星都在银河系中以每小时大于450000英里(一秒200千米)的速度快速移动。
Each runaway planet is zipping through the galaxy at speeds of more than 450,000 miles an hour (200 kilometers a second).
该探测器绕地球两圈后，再以20000英里（32000千米）的时速重返大气层，该速度超过了时速为17500英里（28000千米）的返航太空船。
After circling Earth twice, it would slam back into the atmosphere at more than 20, 000mph (32, 000kph), eclipsing the 17, 500mph (28, 000kph) speed of a returning space shuttle.
在轻松跑的最后，做8 ~10组20 ~ 25秒的恢复跑(或者重复跑8 ~ 10组100米恢复跑)，用你5在千米比赛最后冲刺的速度跑。
Do eight to 10 20 - to 25-second pickups (or the time equivalent of 100 meters) at the end of an easy run once or twice a week.
猛烈的飓风以120千米每小时甚至更快的速度移动，引起巨大的波浪，大雨和洪水。
There are violent winds of 120 kilometres per hour or more, which cause huge waves, heavy rain and floods.
日本一家铁路公司已经开始对据称是世界上最快的火车进行测试，预计速度可能会超过每小时360千米。
Japanese railway company has started testing what it says is the world's fastest train, capable of speed of over 360 kilometers an hour.
光的传播速度为299，792千米/秒，是凭借加速所不可能超越的。
That speed, beyond which it is impossible to accelerate, is 299,792km a second.
这种战车在平坦地形上的速度可达到每小时160多千米。
On ground, it can reach speeds of up to 160 kilometers per hour on even surfaces.
可以用超过160千米每小时的速度搭载两人在空中飞行。
It can carry two people at speeds over one hundred sixty kilometers an hour in the air.
通过比较，研究人员发现，在14个月的时间中，冰层下湖泊溢出了1.7立方千米的水，75公里长的伯德冰川的移动速度加快了10%。
They discovered that during the same 14-month period that 1.7 cubic km of water cascaded through subglacial waterways' the 75-km long glacier downstream pick up speed' moving about 10 percent faster.
该速度是从日内瓦发往700千米外的另外一个实验室的微中子中检测到的。
The speeds were detected in neutrinos fired from Geneva to another laboratory 700km away.
该速度是从日内瓦发往700千米外的另外一个实验室的微中子中检测到的。
The speeds were detected in neutrinos fired from Geneva to another laboratory 700km away.
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