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- Where there is a sound,there is sound wave. 哪里有声音，哪里就有声波。
- Where there is a sound, there is sound wave. 哪里有声音，哪里就有声波。
- It is important to recall that a sound wave in a nonhomogeneously deformed material cannot be a plane wave. 重要的是要记得，非均匀变形材料中的声波不可能是平面波。
- A decrease in density and pressure in a medium, such as air, caused by the passage of a sound wave. 稀薄化介质中密度和压力的下降，例如在空气中，由于声波的穿越而发生
- Repetition of a sound by reflection of sound waves from a surface. 回声因表面反射声波而引起的声音重复
- To repeat(a sound) by the reflection of sound waves from a surface. 发出回声表面反射声波而重复的声音
- Finally, at long ranges, the blast wave becomes essentially a sound wave and its velocity approaches ambient sound velocity. 最后，在很远的距离处，爆震波基本上就变成一种声波，其速度已接近周围的声速。
- Sound Pressure Level (SPL) Sound pressure level is a measurement of the pressure fluctuations of a sound wave as it propagates through the air. 声压级别声压级别是表示在空气中传播的声波的起伏压。
- A sound mind is inseparable from a sound body. 健全的精神是与健康的身体是不可分割的。
- SK Telecom said subscribers can pay 3,000 won (US$2.50) to download a sound wave that is inaudible to human ears but annoys mosquitoes within a range of three feet. 韩国鲜京电信(SK)表示定制用户可以花费3000韩元(合2.;54美元)下载一种声波，这种声波人耳察觉不到，但可以在3英尺范围内驱赶蚊虫。
- SK Telecom Co. said subscribers can pay 3,000 won to download a sound wave that is inaudible to human ears but annoys mosquitoes within a range of three feet. 韩国鲜京电讯公司表示，定制此项服务的用户只需花3000韩元便可下载一种声波。这种声波可以在3英尺的范围内驱赶蚊虫，而人耳却听不见。
- SK Telecom Co. said su cribers can pay 3,000 won (US.50) to download a sound wave that is inaudible to human ears but a oys mosquitoes within a range of three feet. 韩国鲜京电讯公司表示，定制此项服务的用户只需花3000韩元（合2.;50美元）便可下载一种声波。这种声波可以在三英尺的范围内驱赶蚊虫，而人耳却听不见。
- He was a man with a sound constitution. 他是个体质强健的人。
- Echo:Repetition of a sound by reflection of sound waves from a surface. 回声:因表面反射声波而引起的声音重复.
- SK Telecom Co. said subscribers can pay 3,000 won （US.50） to download a sound wave that is inaudible to human ears but annoys mosquitoes within a range of three feet. 韩国鲜京电讯公司表示，定制此项服务的用户只需花3000韩元（合2.;50美元）便可下载一种声波。这种声波可以在三英尺的范围内驱赶蚊虫，而人耳却听不见。
- SK Telecom Co. said subscribers can pay 3,000 won (US$2.50) to download a sound wave that is inaudible to human ears but annoys mosquitoes within a range of three feet. 韩国鲜京电讯公司表示，定制此项服务的用户只需花3000韩元（合2.;50美元）便可下载一种声波。这种声波可以在三英尺的范围内驱赶蚊虫，而人耳却听不见。
- He is waken up by a sound, and has been leaped. 他被撞击声所惊醒，一跃而起。
- He has a sound knowledge of science. 他有扎实的科学知识。
- She soon dropped into a sound sleep. 她很快就睡熟了。
- His arguments had a sound economic base. 他的立论在经济方面是有充分根据的。
