英德
有道
百度
谷歌
图片
维基
百科
位号
item
- 这台设备的位号（箱号）是多少？
What is the item number (case number) of this equipment? - 这就是您的桌位，14号，服务员马上会来招待你们。
It's number 14 and your waitress will be with you right away. - 为了计算出“多普勒效应”的一个数学关系，即音调和运动中的声源和观察者之间的相对关系，奥地利科学家克里斯蒂·约翰·多普勒让几位吹号人坐在一节平板火车上，让几个对音调特别敏感的音乐家坐在铁轨附近。
To work out a mathematical relationship of the“Dopplereffect”，relating the pitch to the relative motion of source andobserver，the Austrian scientist Christian Johann Doppler placedtrumpeters on a railroad flat car and musicians with a sense ofabsolute pitch near the tracks.A locomotive engine pulled theflat car back and forth at different speeds for two days.Themusicians on the ground “recorded”the trumpet notes as the trainapproached and as it receded.
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中国词汇量第二的英语词典
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