目的：观察儿童使用声波震动牙刷清洁牙及控制菌斑的效果。
PURPOSE: to evaluate the efficacy of using sonic electric toothbrush to clean the teeth and control dental plaque in children.
结论：声波震动牙刷能有效帮助儿童清除牙面菌斑，是儿童口腔护理的有效工具。
CONCLUTIONS: Sonic electric toothbrush can help children effectively remove dental plaque. It's an efficient instrument for oral care of children.
由于动荷载引起的管道震动和损坏，例如机械震动，声波震动，液击，压力脉动和泄放阀门泄放时引起的震动。
Piping vibration or damage caused due to dynamic loads, such as mechanical vibration, acoustic vibration, fluid hammer, pulsation and relief valve discharge.
它对震动和海水中传播的声波都非常敏感。
It is very sensitive to vibrations, to sound energy traveling through the seawater.
声波进入耳朵导致耳膜震动，形成了我们听到的一切声音。
Hearing. Every sound we hear is the result of sound waves entering our ears and causing our eardrums to vibrate.
手机的震动能够被手部皮肤感知，手机铃声也要靠产生声波—声音的震动，然后引起鼓膜震动，我们才能听到铃声。
A cellphone set to vibrate can be sensed by the skin of the hand, and the phone's ringtone generates sound waves - vibrations of air - that move the eardrum.
手机的震动能够被手部皮肤感知，手机铃声也要靠产生声波—声音的震动，然后引起鼓膜震动，我们才能听到铃声。
A cellphone set to vibrate can be sensed by the skin of the hand, and the phone's ringtone generates sound waves -vibrations of air -that move the eardrum.
蝙蝠用超声波识别猎物发出的震动。
声波或则叫震动通过测量点时会有一个平衡位置，声音的理特质近似地围绕着它上下波动，通过测量波动可以评估出声音大小。
Sound may be assessed after measurement of an appropriate physical quantity that varies about an equilibrium position as the sound wave or vibration passes the measuring point.
这些物理学现象包括人摄入肺中的空气量、喉头声带的震动以及声波在声道中传播。 典型的合成语音听上去像机器人，因为人类在解剖学上的结构很难被复制。
They include the intake of air into one's lungs, the mechanics of vocal folds in the larynx, and the movement of acoustic waves through the vocal tract.
尽管还不完全清楚其中的原理，但是这好象跟水分子和盐分子遇到声波时的震动方式相关。
Although the process isn't fully understood, it seems to be related to the way water and salt molecules vibrate when encountering sound waves.
今朝常用的传感器首要有开关报警器、震动报警器、超声波、次声波报警器、红外报警器、微波报警器、激光报警器、烟感报警器和温度报警器等。
Now commonly used sensors are mainly switch alarm, vibration alarm, ultrasonic, infrared alarm device alarm, and microwave alarm, laser alarm, smoke alarm and temperature alarm and etc.
它的震动方式比传统玻璃更能减弱了声波的振幅。
The way it vibrates is differentthan conventional glass—it damps sound waves.
这个直接向着地板去的声波将被反弹上来并且会对底面鼓皮的震动造成相消或加重某些频率的影响。
With the tom set up vertically, sound waves hit the floor and bounce back into the bottom head. Angling a tom slightly causes sound waves to scatter, and diffuses them.
这个直接向着地板去的声波将被反弹上来并且会对底面鼓皮的震动造成相消或加重某些频率的影响。
With the tom set up vertically, sound waves hit the floor and bounce back into the bottom head. Angling a tom slightly causes sound waves to scatter, and diffuses them.
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