Sound is made up of pressure waves in the air.
声音是由压缩空气波造成的。
Negative pressure waves (NPWs) in pressure measurements can be an indication of pipeline leakage.
压力曲线上的负压波是管道泄漏的征兆。
A fast projectile penetrating tissue transfers energy during its passage, mainly as pressure waves.
一个高速投射物在其穿透组织时，会以压力波的形式释放出能量。
By using a wave generator, the self -exciting pressure waves can be generated when well pumping unit works.
抽油井正常工作时，借助波动器可在井底产生自激压力波。
The pressure waves produced by atmospheric tide are also reflected in the long period spectrum band of AGWs.
大气潮汐产生的气压波动在长周期段上也有反映。
Water hammer forces can create extremely large pressure waves that can damage piping, piping gaskets and valves.
水锤会产生巨大的压力冲击波，破坏管道，垫圈和阀门。
A massive black hole is sending out jets of particles that crash into the cloud, causing pressure waves to ripple outward.
一个巨大的黑洞正在释放粒子喷流，这些粒子喷流又撞向云层，然后就产生了压力波向外界发出潺潺声的情况。
Several train nose shapes lately developed in Japan to reduce micro-pressure waves during high speed running are described.
基于减小列车高速运行时所产生的微气压波，介绍了日本新开发的几种车头形状。
An observational result of the relation between a kind of pressure waves in the atmosphere and local earthquakes is reported.
本文报道了大气中一种压力波动与区域地震间关系的初步观测结果。
Wind direction, wind velocity, air temperature and air pressure have a very great effect on the propagation of pressure waves.
风向、风速、气温和气压对压力波的传播有十分巨大的影响。
Wind direction, wind ve lo city, air temperature and air pressure have a very great effect on the propagation of pressure waves.
风向、风速、气温和气压对压力波的传播有十分巨大的影响。
It was first suggested in 1995 that the intense pressure waves, which can briefly exceed the speed of sound, could come from trombones.
在1995年，人们首次提出，长号能产生一种高能压力波，它的速度能略超音速。
If the flame is propagating at steady speed in static and homogeneous clouds, flow field just behind the pressure waves is self-similar.
若火焰以稳定速度在均匀的静止云雾中传播，则压力波后的流场是自相似的。
Pressure waves from exploding bombs shook homes and rattled windows, and rumors of an earthquake spread quickly by phone and over the Internet, the report said.
报道指出，炸弹爆炸产生的冲击波震动了房屋，窗户也哗哗作响，关于地震的谣言通过电话和互联网迅速传播。
This paper presents an analysis of the characteristics and laws of formation of pressure waves in guns, based on the ignition process and propellant bed structure.
本文根据点火过程和药床结构，分析膛内压力波形成的特征及其规律。
A check valve exhaust gas recirculation (EGR) system, which makes effective use of intake and exhaust pressure waves, was proposed for turbocharged diesel engines.
提出了采用单向阀利用进排气压力波动的废气再循环(EGR)系统。
In operation, the motor structure operates as a linear motor, causing radiating surface 14 to vibrate along a axis of motion 22 (hereinafter "axis"), radiating pressure waves.
在运行中，马达结构作为线性马达工作，使辐射表面14沿着运动轴线22(下文中称为“轴线”)振动，辐射压力波。
Barometric pulse could cause stronger disordery degree and better flushing effect by comparing the transfer rates of two pressure waves and pressures caused by valve opening and barometric pulse.
对比开阀和气压脉冲所形成的两种瞬变流形式的压力波传播速度、压力等参数，发现气压脉冲更能增加管道中水流的紊动程度，冲洗效果更好。
The typical faults of diesel injector were simulated and the pressure waves were measured with the pressure sensor clamped on high pressure line. Artificial neural network was used in fault diagnosis.
通过实验模拟喷油器的典型故障，用外卡式压力传感器测取高压油管的燃油压力波，并利用人工神经网络模型进行了故障诊断。
The system utilizes the own energy of transportation flow, automatically control and adjust the flow state in transportation pipeline, eliminates and decreases the pressure waves causing by water ham…
该系统利用流体自身的能量，自动控制和调节输送管道的流动状态，消除和降低因水击及其他原因引起的压力波动，使其达到新的平衡。
When two waves of opposite direction but similar frequency collide, they create a special kind of pressure wave that carries energy to the ocean bottom.
当两方向相反但频率相似的波浪相撞时，会产生一种特殊类型的压力波，而这种压力波会把能量输送到海底。
Shock waves are just a particular kind of pressure wave - which is what sound itself comprises.
冲击波只是压力波的一种特定形式-它是声音自身所包含的。
The direction of travel and strength of shock waves are influenced by wind, speed, and direction, and by air temperature and pressure.
冲击波的行进方向和强度受到风、飞行速度及方向、气温和气压的影响。
According to the shock theory, the ejecta produced by explosion form the pressure pulse, and it spreads in forms of either compression waves or expansion waves.
根据激波理论，爆炸产生压力脉冲并以压力波的形式传播，既有压缩波也有膨胀波。
"Shock waves are acoustic waves that create pressure that can be focused," says Medispec's Gil Hakim, the company's director of new product development.
“冲击波是一种声波，它形成可以聚焦的压力，”Medispec公司的新产品开发总监吉尔哈姬姆说。
By using ultrasonic waves, the scientists have developed software that creates pressure when a user's hand "touches" a hologram that is projected.
科学家利用超声波研发出一种软件，当使用者伸手“触摸” 3d影像时，就能感受到这种软件制造的压力。
The experimental results revealed that an appropriate overlay thickness can not only use laser energy effectively but also provide optimal peak pressure of shock waves.
实验表明，采用一定厚度的约束层，既能有效利用激光能量，又能获得较大的激光冲击波峰压；
When waves of low-pressure move along the front, cloudiness increases and steady rains can be expected, occasionally with flooding.
当低压波沿着锋面移动时，云量的增长和稳定的雨量都是可以被预测的，偶尔还发大水。
When waves of low-pressure move along the front, cloudiness increases and steady rains can be expected, occasionally with flooding.
当低压波沿着锋面移动时，云量的增长和稳定的雨量都是可以被预测的，偶尔还发大水。
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