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- speed of sound as amended 声速修正
- When did the first measurement of the speed of sound take? 第一次测量声速是在什么时候？
- 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
- 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。
- Stand-in vicar Lee Rayfield shattered the illusions of dozens of kids when he joked in his carol service sermon that Santa and his reindeer would burn up doing 3,000 times the speed of sound as they delivered gifts to 91.8 million homes. 李·雷菲尔德是教区的替补牧师，他在颂歌布道时开玩笑说，为了给9180万家庭送去礼物，圣诞老人驾着驯鹿的飞行速度必须是音速的3000倍，如果真是那样的话，他早就着火烧起来了。他的话粉碎了许多孩子的梦想和寄托。
- Mach two equals twice the speed of sound. 二马赫相当于声速的二倍。
- 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 speed of light is faster than that of sound. 光速比音速要快。
- New planes can fly at the speed of sound. 新型飞机可以音速飞行。
- Modern planes top the speed of sound. 现代飞机超过音速。
- The new airplane flies at twice the speed of sound. 这架新型飞机以两倍于音速的速度飞行。
- The frequency, wave length and speed of sound are closely related. 频率、波长和声速三者是密切相关的。
- The frequency, wave length, and speed of sound are closely related. 频率，波长和声速三者是密切相关的。
- The asteroid or comet flashed through the sky more than 40 times as fast as the speed of sound. 小行星或彗星发著光划过天际，速度比音速快40倍以上；
- The speed of sound varies in solids,liquids and gases. 在固体、液体和气体中，声音的速度不一样。
- The loss of sound can first reter to the disappearance of the very sound as a phoneme in the phonological system. 语音脱落首先可以指音位系统中作为音位的某个语音的消失。
- The speed of sound varies in solids, liquids and gases. 在固体、液体和气体中,声音的速度不一样。
- When did the first measurementof the speed of sound take? 第一次测量声速是在什么时候?
- Even at the age of 80, the old man's heart was as sound as a bell. 尽管已是八十高龄,老人的心脏仍毫无问题。
- But as forward speed increases, thrust falls away until at about 450 mph, propeller efficiency is seriously impaired as the blade tips approach the speed of sound. 但是当向前的速度增加时，推力会下降直到速度到450海里/小时，当翼尖接近音速的时候螺旋桨的效率会严重削弱。
