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- When did the first measurement of the speed of sound take? 第一次测量声速是在什么时候？
- Filtration of unwanted contents. 过滤不想要的内容。
- Every paragraph is a distillation of sound judgment. 每段话都是正确判断的结晶。
- Airliners in service at present cannot fly faster than the speed of sound. 目前供使用的客运机飞行速度不能超过音速。
- Characterized by high volume and intensity. Used of sound. 大声的以高音量和强烈为特征的。用于声音
- Mach two equals twice the speed of sound. 二马赫相当于声速的二倍。
- His distinction of sound is excellent. 他辨别声音的能力很强。
- Our teacher has mutation of sounds suddenly. 我们的老师突然语音发生了变化。
- Wood is a poor conductor of sound. 木头是声音的不良导体。
- A device for measuring the speed of sound in water. 速度计，速度表用于测量声音在水中的速度的仪器
- The percentage of sound seed is usually 2-10%. 其健壮的种子通常仅占2-10%25。
- Characterized by harmony of sound; melodious. 悦耳的声音和谐的；悦耳的
- filtration of sound 滤声
- Air is the common medium of sound. 空气是声音的普通介质。
- Loudness of sound may be measured. 声音的响度可以测量。
- Challenge, explore, sedimentation, filtration of the process is life wonderful. 挑战，探索，沉淀，过滤的过程就是生活的精彩。
- The plane is flying at the velocity of sound. 飞机以音速飞行。
- At the risk of sounding ungrateful, I must refuse your offer. 我甘受拂逆盛情之嫌，也必须谢绝你的提议。
- The speed of sound in water is about four as great as in air. 声音在水中的速度是空气中的四倍左右
- They are children of sound mind and body. 他们是身体健康的孩子。
