Regular repeating actions such as sound waves, light waves, or radio waves have a certain frequency, or number of waves per second.
有规律的重复活动如声波、光波、无线电波都有一个特定的频率，或者说是每秒的波动次数。
That may sound odd, but the fact is at the moment of the Big Bang, both matter and anti-matter were created for a short time, and I mean just a fraction of a second.
这听起来可能很奇怪，但事实是在大爆炸的那一刻，物质和反物质都是在很短的时间内被创造出来的，我的意思是只有几分之一秒。
It functions by analyzing the waves of the incoming sound and creating a second set of outgoing waves.
它的工作原理是分析传入声音的声波并产生新一轮向外扩散的声波。
Each stream being watched will require a Megabyte a second of bandwidth and a latency of less than 60ms if it is to deliver crisp, pin-sharp video and pristine sound.
如果要提供清晰的视频和纯净的声音，视频的每个数据流需要一秒一兆字节的带宽，延迟时间要小于60毫秒。
“From the first, second, third and fourth editions all sound and sane expressions of opinion must be left out, ” Twain instructed them in 1906.
“在第一、第二、第三直到第四版中，所有合乎理智，正确合理的观点表达必须剔除，”吐温在1906年主持了这些修订。
Sound: play open strings alone; play slow scales, sustaining a 20- to 30-second bow; practice everything in the lower or upper half; or watch your contact point in the mirror.
音色︰只用空弦拉奏；慢慢地拉奏音阶，一弓维持在20-30秒；所有以上半弓或下半弓练习；或对着镜子看（弓的）接触点。
The speed of sound is - 340 meters per second-- - it depends a little bit on the temperature-- about 770 miles per hour.
声音的速度是,340米/秒-,它有些取决于，气温-,大概是770公里/小时。
This second problem "is the construction quality of the building itself - its structure is not completely sound or its materials are not very strong, which is possible," Mr. Ma said.
第二个问题是因为“建筑本身的质量差——可能结构不是很安全，或者材料不结识。”马先生说。
But the Lithuanian hopes to break the boundaries of sound and image, photographing street brawls. "That must be very noisy and vivid, changing every second.
打破声音和图像的界线，一直是立陶宛人对摄影的期望，而“大街上的声音必定是嘈杂而生动的，每一秒都在变化，捕捉好的瞬间将会轻而易举”，这位摄影师说。
When shooting video, we noted that audio recording starts slightly later than the video, leaving the first half second or so without sound.
可是，当拍摄影片的时候，我们发现有轻微的影音不同步，因而在影片播放的头半秒左右会出现有画面没声音的情况出现，这可以在我们的影片样本中看到。
In this case, the 33 megajoules launched the shot 5,500 feet per second, exceeding the speed of sound and releasing a sonic boom.
如若这样，那么3千3百万焦耳发射出的炮弹速度高达每秒5500英尺，这一速度超越了音速，会产生音爆。
In this case, the 33 megajoules launched the shot 5, 500 feet per second, exceeding the speed of sound and releasing a sonic boom.
如若这样，那么3千3百万焦耳发射出的炮弹速度高达每秒5500英尺，这一速度超越了音速，会产生音爆。
Half the time the first and second clips were the same, and half the time one of the sounds was substituted for another version of the same sound or a different sound. Here are the results.
其中一半的时间两个声音片段是一样的，另一半时间有一个声音被替换为同一个声音的不同版本或是不同的声音。
In a second study, students rated crunchy foods as crunchier in the presence of loud white noise-perhaps because it tuned them into the sound of their food.
因为在第二项研究中，或许由于学生们把响亮的白噪声当成了食物咀嚼的声音，他们觉得食物更松脆了。
But this confusion vanished; a second sound similar to the first roused him thoroughly; he looked and recognized the fact that these two stars were the lanterns of a carriage.
这时，他才从梦中渐渐清醒过来，一声和第一次相同的响声把他完全惊醒了，他注意看，这才看出那两颗星原来是一辆车子上的挂灯。
Second, could you specify the international and regional issues on which China and the US have had sound communication and cooperation?
第二个问题，你能否介绍一下，中美具体在哪些国际和地区问题上进行了良好沟通与合作？
The gym, on the second floor of an old Masonic temple with sagging ceilings, has a fitness room, a heavy bag room and a ring that reverberates with the sound of hip-hop.
这个拳击馆坐落在一个共济会教堂的二楼，天花板已经有些陷落了，里面有一个健身房、一个沙袋房和一个回响着嘻哈乐的拳台。
Though I don't have counts of their phonemic inventories to hand, it seems little wonder that Japanese, with a fairly simple sound system, was the fastest in the study, and Spanish was second.
我手头虽然没有日语和西班牙语的音位总量数据，但是，语音系统较为简单的日语语速最快，西班牙语次之，这似乎一点也不奇怪。
A second consideration is that a useful synth VCO is expected to output several different waveforms, so that the synth player has harmonic starting points for creating a given sound.
第二个考虑因素就是要求有效的合成器VCO能产生多种不同的波形，这样一来的话合成播放器对产生某一给定的声音都有相应的和声始点。
When the man took a second biscuit, I didn't look up and I didn't make a sound. I pretended to be very interested in the puzzle.
那个男人拿第二块饼干时，我没抬头，也没出声，装出一副对字谜很感兴趣的样子。
Second, we need more than rhetoric to feel confident that only educationally sound strategies will be used in our children's schools.
其次，我们需要的并不是“在教育方面我们一定会采取卓有成效的策略，对此我很有信心”之类的夸夸其谈。
That staging point is expected to come at about the 124-second mark, when the supersonic Ares I-X rocket is traveling Mach 4.7? More than four times the speed of sound, its Max speed for the flight.
分离时刻预计在124秒时，这时超音速火箭战神i - X以4.7马赫的速度飞行——这是音速的四倍，也是飞行的最高速度。
Second, a sound risk prompted system , the establishment of the system of notification and risk prompts.
第二，完善风险提示制度，通报制度的建立和风险提示。
Sound travels at 340 metres per second in air.
声音在空气中以每秒340米的速度传播。
The second need is a more established global rule of law: "I'm not talking about a global world government, but a sound system that tells entrepreneurs the rules of the game are stable."
第二个是建立更完善的全球法律规范。
The second need is a more established global rule of law: "I'm not talking about a global world government, but a sound system that tells entrepreneurs the rules of the game are stable."
第二个是建立更完善的全球法律规范。
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