闪亮的回击以光速的一半速度上行传播，由于它的速度太快，在一张图象中不能捕捉到这一过程。
The bright return stroke travels upward at around half the speed of light, and is too fast to capture in more than one image.
当尝试新的肌肉记忆模式的时候，开始时以一半速度进行，如此可以帮助你更快理解挥拍的情形，然后逐渐地选择速度。
When trying new muscle memory patterns, go at half speed to begin with. Going at half speed helps you figure out the swing much quicker. Then gradually pick up the speed.
有研究表明，在道路上画上笔直的横杆，可以在开始将司机的平均速度降低一半。
Some studies suggest that straight, horizontal bars painted across roads can initially cut the average speed of drivers in half.
如果这些行为不加以制止，那么珊瑚三角区内一半的物种将以每年1-2％的速度继续消亡。
If such practices are unchecked, half the species in the Coral triangle will continue to disappear at a rate of 1-2% a year.
到20世纪90年代，地球上原有的雨林只剩下不到一半，而且它们每年都继续以惊人的速度消失。
By the 1990's, less than half of the earth's original rain forests remained, and they continued to disappear at an alarming rate every year.
被消耗的能量(与鸟和飞机的速度相加的平方成正比)将大约是半吨的重物落下十英尺。
The energy to be dissipated (proportional to the square of the combined speed of bird and plane) would be more like half a ton being dropped ten feet.
但是，多年来，船的速度渐渐有所提高施里夫在1816年用了25天从新奥尔良航行到路易·维尔，到1853年时，时间缩至四天半。
Over the years, however, the boats' speeds increased; Shreve's 25-day run from New Orleans to Louisville in 1816 had been shortened to 4.5 days by 1853.
在过去十年里，钢铁行业以非常快的速度增长，现在控制了全球一半的钢铁生产。
Over the last decade, it has grown at warp speed and now commands more than 50 percent of world production.
与此相反，撒哈拉以南非洲地区的出口额增长每年平均仅有2%，部分原因是他们所出口的产品的世界贸易额增长速度只有整个世界贸易额增长速度的一半。
By contrast, growth in export volumes in Sub-Saharan Africa averaged only 2 percent per year, in part because world trade of the products they export grew at half the rate of growth of world trade.
白化现象原本杀死了环礁湖海床上的所有珊瑚，但现在几乎一半的珊瑚又再度生长了起来——这样的恢复速度着实罕见。
The bleaching had killed all the coral on the lagoon floor, but almost half appeared to be growing back-the fastest recovery any of us had ever seen.
为什么这个程序使用了方面后，它的运行速度只有一半了呢？
Why is the program running only half as fast with the aspect applied?
沙阿先生表示，在近几十年中，这些分散的发电系统成本已降至以往的一半，而且它们的安装速度几乎与柴油发电机不相上下。
The cost of such distributed generation systems, Mr Shah says, has fallen by half in the past decade, and they can be set up almost as fast as diesel generators.
你现在可以激活30秒的回放功能，你也可以改变回放的速度(半速和两倍速度)。
You can now easily activate a 30-second replay, for example, and you can change the replay speed (half-speed and double-speed).
但从物种灭绝的速度来年，在这个世纪末，我们就有可能失去它们中的一半，尤其是在热带雨林和珊瑚礁地区。
But at the rate things are going, by the end of this century, we may well have wiped out half of them, especially in tropical forests and coral reefs.
美联储的经济学家们认为，到2010年美国劳动力的供给将会仅以每年0.4%的速度上涨，大大低于目前的一半水平。
By 2010, the Fed economists reckon, Labour supply in America will be rising by a mere 0.4% a year, well under half its current rate.
半导技术还在革新，但速度更缓了，生产率的趋势很快就可以反映出来。
The technology is still improving but at a slower pace, and productivity trends will soon reflect that.
每天，腐烂中的垃圾都释放出大量对气候有害的混合气体，其中超过一半均为与二氧化碳相比能使气候变暖速度加快20倍的沼气。
Everyday, the decaying trash releases large quantities of a climate-harming gas cocktail.More than half of the landfill gas is methane, which warms the planet 20 times faster than carbon dioxide.
在2015年把贫困人口减少一半的目标在全球层面有望实现，但是在撒哈拉以南非洲地区，如果不能尽快提高进展速度，就难以实现。
The goal to halve poverty by 2015 will likely be met at the global level, but not in Sub-Saharan Africa unless progress there can be accelerated quickly.
我先使这两个碰撞，它们两个相碰，当它们碰撞的时候，我期待速度是一半。
And first I'm going to slam these two onto each other, and so when they collide, I expect the speed to be half.
为此，必须半交互式地提供资源名。否则，参与者完全可以迟签他们的日期戳的日期，制造出创建速度很快的假象。
To make this work, a resource name has to be provided semi-interactively -- otherwise, a candidate could just post-date their datestamp to give a false impression of rapid creation.
APEX数据显示喷流中的物质正以一半光速的速度前进。
The APEX data shows that material in the jet is traveling at about half the speed of light.
因此，这款相机能够最高连拍速度达到了10张/秒，由于半透镜技术的特性，在连拍时能够连续自动对焦。索尼表示，全球没有第二部相机能过做到。
As a result, the camera can shoot an incredible 10 shots a second, refocusing all the way. Sony says no other camera in the world can do that.
比特币的货币供应以平均每小时300单位货币的速度增加，但每隔四年速率将降低一半。
The Bitcoin supply increases at a rate of 300 coins every hour on average at the moment, but every four years that rate will fall by a half.
如果按照此速度过上十年就意味着，七年内价格将会翻倍，所以价格应该会上涨到两倍半。
If it goes on for ten years that means that the -it'll double in seven years, so it'd be going up like two and a half fold.
欧洲最大的经济体德国的经济增长速度仅为该数字的一半。
因此，保持巡航速度消耗的燃料大约一半都是用于克服紊流产生的阻力。
As a result, roughly half the fuel required to maintain a level cruise is being burned to overcome the drag imposed by a turbulent boundary layer.
因此，保持巡航速度消耗的燃料大约一半都是用于克服紊流产生的阻力。
As a result, roughly half the fuel required to maintain a level cruise is being burned to overcome the drag imposed by a turbulent boundary layer.
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