| 1. | The sparker was originally developed for fundamental studies of underwater sound propagation and of subbottom geology .
火花发生器原来是为了进行关于水下声波传播及海底地质的基础性研究而制造的。 |
| 2. | Acoustic transit time
声波传播时间 |
| 3. | Sound intensity describes the flow of acoustic energy produced by a sound source , and it is a vector
声强是指单位时间内，声波通过垂直于声波传播方向单位面积上的声能量，它是个矢量。 |
| 4. | This fact is not apparent to the human ear ; the sound waves move too fast to hear without special equipment
这个事实对人类的耳朵很不明显。声波传播太快以至于不应用特殊设备是无法听到的。 |
| 5. | This fact is not apparent to the human ear ; the sound waves move too fast to hear without special equipment
这种现象对人的耳朵来说不明显.如果没有特殊的设备,声波传播的速度太快人耳听不到。 |
| 6. | This fact is not apparent to the human ear ; the sound waves move too fast to hear without special equipment
这个现象对人耳来讲，并不明显。声波传播得太快以至于不用特殊的测量仪器就无法听到。 |
| 7. | This fact is not apparent to the human ear ; the sound waves move too fast to hear without special equipment
人类的耳朵对老鼠发出的这种声音没什么反应;这个声音的声波传播速度超出了人类的听觉范围,没有特殊设备的帮助人类听不到这种声音 |
| 8. | Sonic trajectory reflects professional . chinese taiji imagery , a powerful expression superb energy . sincerely cooperate in the development of interactive hands symbol of the team
声波传播轨迹体现专业性。中国太极意象，体现出神入化的强大能量。双手象征团队的精诚合作互动发展。 |
| 9. | In the field of underwater acoustic communications , the intersymbol interference caused by multipath effects will make the reliability and the rate of the propagation of underwater acoustic signals
在水声数字通信系统中，声波传播的多途效应会引起严重的码间干扰，使水下数据传输的可靠性和数据传输速率都大大的降低。 |
| 10. | This paper describes some experimental investigations of propagation properties of sound in various types and thickness of grain samples using the method of standing wave tube for the first time , extends the sound propagation theory in porous media and develops the sound propagation model in grain , analyzes and identifies the cree ping sound signals of five species of pests
为了深入研究和有效监测粮堆内部深层害虫发出声信号的传播特性，本文首次采用驻波管法，对声信号在不同种类、不同厚度粮食中传播特性进行了检测和分析，并且进一步推广、发展了多孔介质中声传播理论，建立了粮食中声波传播模型。 |
