今晚天王星距离地球超过2.5光小时远。相对的，月球——我们最近的邻近天体——距离地球只有1.3光秒远。
Uranus looms well over 2.5 light-hours away from Earth tonight. In contrast, the moon - our nearest celestial neighbor - resides only 1.3 light-seconds away.
随着中微子束的收紧，中微子仍然比光提早了60纳秒抵达了格兰·萨索。
With the beam tightened up, the neutrinos still arrived at Gran Sasso 60 nanoseconds faster than light would have.
不幸的是，许多内置测光器最多在30秒左右就变得不太精确了。
Unfortunately, most in-camera light meters become inaccurate or Max out at about 30 seconds.
由于索引器本身只是推消息处理过程中的一个环节，所以光索引器本身的延时必须保证在亚秒级别。
Since the indexer is only one part of the pipeline a Tweet has to make it through, we needed the indexer itself to have a sub-second latency.
通常，你可以用大点的光圈测光(这样，测量的曝光时间就在30秒以内)，随后缩小光圈，相应地增加曝光时间。
Usually one can first meter using a larger aperture (so that the metered exposure time is under 30 seconds), then stop down as necessary and multiply the exposure time accordingly.
这种X光脉冲快门速度不到100飞秒（100飞秒= 万亿分之一秒的1/10）。
The X-ray pulses have a shutter speed of less than 100 femtoseconds (100 femtoseconds = 1/10 of a trillionth of a second).
王建光(Wang Jianguang)以19秒的时间骑自行车通过20米的啤酒瓶路，创造了新的迪尼斯世界纪录。
Wang Jianguang sets a new Guinness World Record by riding along a row of beer bottles for 20 metres in 19 seconds.
要向捕捉光的轨迹，你必须让相机曝光4到10秒；而如果你把相机放到手上去拍摄的话，你的照片会很模糊。
You must shoot with an exposure of at least four to 10 seconds to capture the trails of light, and your images will be blurry if the camera is held by hand.
一秒钟内可拍摄610万张照片，快门速度为440万亿分之一秒，在这么短的时间内光也只前进了不到一厘米。
It can take 6.1 million pictures in a single second, at a shutter speed of 440 trillionths of a second. Light itself moves just a fraction of a centimeter in that time.
这套系统每秒具有50G比特的信息传输量，足以在1秒钟内完成一部全光高清电影传输。
The system can carry data at a rate of 50 gigabytes per second, enough to transfer a full-length HD movie in less than a second.
在一次森林调查期间，从一架飞机负载的激光雷达上扫射出一束发出大约一秒7万次脉冲的红外光从树冠层上穿过。
During a forest survey, an aircraft-borne lidar sweeps a beam that fires about 70, 000 pulses a second over the canopy.
在一次森林调查期间，从一架飞机负载的激光雷达上扫射出一束发出大约一秒7万次脉冲的红外光从树冠层上穿过。
During a forest survey, an aircraft-borne lidar sweeps a beam that fires about 70,000 pulses a second over the canopy.
这个装置的原型使用了一个10英寸的屏幕，这个屏幕是用一种新型“光致折变”（photorefractive）材料制成的，这种材料使得全息图能够每两秒刷新一次。
The prototype uses a 10 inch screen made from a new type of 'photorefractive' material that can refresh a hologram every two seconds.
精确定量满月时的曝光时间不好捉摸;如果景物有散射并且直接受光，那么就在ISO 100下使用f/2.0和30秒曝光作为初始值，然后向上图的1——4四个方向进行调节。
Gauging exposure times during a full moon can be tricky; use f/2.0 and 30 seconds at ISO100 as a starting point (if subject is diffuse and directly lit), then adjust towards scenarios 1-4 accordingly.
通过考虑脉冲频谱的增益色散，提出了一个分析亚皮秒光脉冲在半导体光放大器(SOA)中传输的新思路。
We proposed a novel method to analyze the propagation of sub-picosecond optical pulses through semiconductor optical amplifiers (SOA), fully considering spectral dispersion of ultrashort pulses.
在现代生物学领域，不同类型的飞秒光镊已成为了强有力的工具。
Different types of femtosecond optical tweezers have become a powerful tool in the modern biological field.
结果表明，利用该方法不仅能够完全补偿飞秒BBO光参量放大在连续调谐时三波的群速失配，而且能够实现最大的参量带宽。
The results indicate that this method not only can match completely group velocities among three waves, but also can achieve maximal parametric bandwidth for continuous tunable femtosecond BBO OPA.
计算分析表明，该光路可在一帧数字全息图上连续记录间隔为纳秒量级的多幅超快过程的动态图像。
Computation result shows that a series of dynamic multi-images in nanosecond time scale of ultra-fast process can be automatically recorded on a piece of digital hologram.
本文研究了质子转移型有机分子7 -羟基喹啉在皮秒激光脉冲作用下的光开关现象。
Optical switch phenomenon of 7-hydroxyquinoline with excited state proton transfer effect was investigated using picosecond laser pulses.
利用条纹照相机直接观察和记录了由全息相位共轭技术产生的相位共轭的皮秒光脉冲。
The phase conjugation of picosecond optical pulses is observed and recorded directly by using a streak camera. The signals are achieved by holographic phase conjugate technique.
飞秒激光光梳技术大大简化了光频的测量。
Femtosecond laser-frequency comb techniques are vastly simplifying the measurement.
本文首次报道一种专门用于记录飞秒激光引发空气电离动态过程的脉冲数字显微全息光路。
We report, for the first time, a specially designed set-up of pulsed digital holography for micro - recording of air-ionization process induced by femto-laser.
利用矩法分析了飞秒光脉冲的传输特性。
The transmission properties of femtosecond optical pulse are analyzed with the momentum method.
对用光谱位相相干直接电场重建法（SPIDER）测量飞秒光脉冲啁啾特性的光谱位相干涉仪进行了数值模拟；
The numerical analyses have been conducted for characterizing femtosecond laser pulses with the spectral phase interferometry for direct electrical field reconstruction (SPIDER).
给出了描述具有几个光振荡周期的飞秒激光脉冲在非线性光纤中传输方程的解。
The solution of the nonlinear wave equation describing propagation of a femtosecond laser pulse with duration of several optical oscillation periods in a nonlinear fiber is presented.
通过脉宽为周期量级的超快强场激光脉冲与惰性气体原子的极端非线性相互作用，能够产生单个的阿秒量级的极端远紫外光脉冲。
Single isolated attosecond (as) extreme ultraviolet (XUV) pulses can be generated via the nonlinear optical interaction between intense few-cycle laser fields and noble gas atoms.
介绍了2005年诺贝尔物理学奖的获奖工作-用锁模飞秒激光光梳去测量光的频率。
The work of the winners of the 2005 Nobel prize in physics is briefly reviewed. They measured the frequency of light with mode-locked laser comb.
介绍了2005年诺贝尔物理学奖的获奖工作-用锁模飞秒激光光梳去测量光的频率。
The work of the winners of the 2005 Nobel prize in physics is briefly reviewed. They measured the frequency of light with mode-locked laser comb.
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