The other common type of sound wave is a periodic wave. When you ring a bell, after the initial strike (which is a little like a hand clap), the sound comes from the vibration of the bell. While the bell is still ringing, it vibrates at a particular frequency, depending on the size and shape of the bell, and this causes the nearby air to vibrate with the same frequency. This causes pressure waves of air to travel outwards from the bell, again at the speed of sound.
Pressure waves from continuous vibration look more like this：+另一个声波的类型是周期波，当你击打一个铃时，击打下去的那一个瞬间跟拍手有一点相像，声音由铃的振动产生，当铃持续发出声音时，它的震动是以一个特别的频率进行的，这个频率与铃的大小和形状有关，而这个振动造成了铃周围的空气也以相同的频率振动，这使得铃声透过空气的压力波传递到更远的地方，以声音的既有速度进行，持续震动的压力波看起来跟以下这个图很像
When you ring a bell, after the initial strike (which is a little like a hand clap), the sound comes from the vibration of the bell. While the bell is still ringing, it vibrates at a particular frequency, depending on the size and shape of the bell, and this causes the nearby air to vibrate with the same frequency. This causes pressure waves of air to travel outwards from the bell, again at the speed of sound.
Pressure waves from continuous vibration look more like this：+另一个声波的类型是周期波，当你击打一个铃时，击打下去的那一个瞬间跟拍手有一点相像，声音由铃的振动产生，当铃持续发出声音时，它的震动是以一个特别的频率进行的，这个频率与铃的大小和形状有关，而这个振动造成了铃周围的空气也以相同的频率振动，这使得铃声透过空气的压力波传递到更远的地方，以声音的既有速度进行，持续震动的压力波涨的根以下这个图很像
We all know that sound can travel through air.
我们都知道声能在空气中传播。
A little wobble sounds natural, but extreme wobble will sound like the cymbal is almost canceling out during the travel when the cymbal edges get near 90 away from the mic. A possible fix is to angle the mics at about 45 in towards the center of the cymbals, but this may not totally fix the problem and is not a good position for the overheads in general.
小的摆动听起来会很自然，但是极端的摆动会在镲的边缘与麦克接近90旱墓讨腥蒙籼鹄醇负跬耆窒恕R桓隹尚械陌旆ㄊ墙罂45褐赶蝻锏闹行模钦饣蛐聿荒芡耆饩稣飧鑫侍猓⑶彝ǔ＠此刀杂贠H麦也不是一个好的摆位。
The publication market that concentrated force quantity signs up for print, sound to resemble the place such as restaurant of hub of tourist attraction of goods, computer software products and computer electron market and flourishing block, travel, traffic, hotel to the book has comprehensive examination, capture of all kinds and illegal publication and pilfer edition goods stoutly, ban those who hawk illegal publication to swim to business land spreads out and notify operator without card stoutly.
集中力量对书报刊、音像制品、计算机软件制品及电脑电子市场和繁华街区、旅游景点、交通枢纽、宾馆饭店等场所的出版物市场进行全面检查，果断收缴各类非法出版物及盗版制品，果断取缔兜售非法出版物的游商地摊和无证照经营者。
You would need to travel at about 64 times the speed of sound to reach there in 15 minutes.
如果你以64倍音速旅行，到达那里也要15分钟。
There it is now, a little travel-worn, truly; and one of the ivory bars is cracked, and a brass rail bent; but the rest of it's sound enough.
机 器现在就在那里，旅行后确实已有点破损，一根象牙棒裂开了，一根铜横杆也弯了，但其余部分完好无损。
To understand what a reverberant sound actually is and what information our hearing system is able to extract from it, you need to think about how sound waves travel and what happens when they encounter various surfaces.
去了解一下混响声音实际上是任何形成的，以及我们的听觉系统能从中获得什么其他信息，有必须去思考声音是如何传播的，以及他们遇见不同材料的平面后，会发生什么问题。
This trend will continue, for designers and manufacturers are considering a hypersonic transport, a plane that would travel six times the speed of sound at an altitude of 36000 meters.
这种趋势将继续下去，为设计师和厂商正在考虑一项高超音速运输，飞机旅行会六倍音速在海拔36000米。
It takes time for both light and sound to travel.
光和声音的传播都需要时间。
Chuck Yeager first broke the sound barrier in his rocket-powered X-1 in 1947, so it's staggering to think that just 23 years later, we stood poised to take our leisure travel supersonic as well. In the summer of 1970, the SST race was three-way, with Russia's Tu-144 and the still-on-the-drawing-boards Boeing 2707-300 joining the legendary Concorde.
1947年，查克·耶格尔用火箭动力的X-1第一次突破了音障，让我们吃惊的是，仅仅23年后，我们在休闲旅行中已经可以享受超音速飞行。1970年夏天，有三路兵马征战超音速运输机领域，俄罗斯的图-144、仍然在设计阶段的波音2707-300以及协和超音速客机。
When we speak, sound waves begin to travel and go in all directions.
我们说话时，声波就开始传播，并向四面八方扩散。
When we speak, sound waves begin to travel and go in all direction.
我们说话时，声波便开始向四面八方扩散。
Sound ecological environment is a home you travel, investment Hing rate, processing to select the ideal of cooperation.
良好的生态环境是你居家旅行、投资兴企、加工合作的理想选择地。
Sound has to travel through solid liquid or air to reach our ears.
声音必须通过固体液体或气体才能传到我们耳中。
Travel from East to West Coast in interviews with Chris Cheshire and Mindgame secret weapon Ben Schwab, catch a glimpse into the French scene with Fabrice Guyont, check the 1st Annual SDSF Open, plus Take 5 with Murda, `07 products, blade DVD reviews, Sound Check with Pigeon John, Brian Konoske portfolio spotlight, 15 Minutes with Jon Elliott, Brad Magnuson Amatuer Hour and much more.
旅游，从东到西沿岸采访克里斯柴郡和mindgame秘密武器贲施瓦布赶上一瞥到法语现场与法布里guyont ，选中第一年度sdsf开放的，再加上采取5 murda ，07年的产品，刀片DVD的评论，健全检查与鸽子约翰布赖恩konoske组合的聚光灯下，15分钟与琼埃利奥特，布拉德马格努森业余小时，甚至还有更多。
In addition, it gives you the freedom to travel up to 100m from your sound source.
此外，它使您可以在离声源100米的范围内随意走动。
A simplified travel—time model is used for simulating 2—D NTT in drained pad-dy field which has a steady ground—water flow field, and under dry farming land con-dition, a 1—D model of saturated—unsaturated flow is used when the water table isabove the drain pipes, a 2—D simplified travel—time model for NTT are adopted forthe flow field below the pipes. these methods are theoretically sound and simple in cal-culation, in which important conditions, such as initial nitrogen concentration distribu-tion in the vertical profile of the soil, ion adsorption, nitrogen transformation and plantuptake are considered.
数值计算过程中，针对淹水稻田具有稳定流场的特点，本文结合田间流网采用二维简化模拟计算方法进行研究。对于旱作农田在暗管以上采用一维饱和--非饱和氮素运移转化模型计算，暗管以下采用二维简化模型计算。本方法克服了已有方法之不足，在氮素运移转化模拟计算中，既考虑了剖面土壤初始浓度非均匀分布的情况，又考虑了离子吸附、氮素转化及作物吸收等过程，且针对暗管的非稳定渗流场在排水过程中的不同时段有着不同的渗流域，模型能够自动计算各点的排水强度，自动调整计算各条流带在暗管出流的氮素浓度中所占比重。
The aeroplane will travel at twice the speed of sound.
这架飞机的速度将是音速的两倍。
This Infantino Super Plush Travel Gym entertains baby through sight, touch and sound.
这种因凡蒂诺超级毛绒旅游健身招待通过视觉，触觉和声音的婴儿。