railroad flat 中文意思是什麼
railroad flat
解釋
(沒有各間分別進出的走廊的)一間接一間的套房,列車式套房。-
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
為了計算出「多普勒效應」的一個數學關系,即音調和運動中的聲源和觀察者之間的相對關系,奧地利科學家克里斯蒂?約翰?多普勒讓幾位吹號人坐在一節平板火車上,讓幾個對音調特別敏感的音樂家坐在鐵軌附近。 -
The prairie, across which the sledge was moving in a straight line, was as flat as a sea. it seemed like a vast frozen lake. the railroad which ran through this section ascended from the south - west to the northwest by great island, columbus, an important nebraska town, schuyler and fremont, to omaha
平原象是一個遼闊無邊的結冰池塘,在這個地區這一條由西南向西北延伸的鐵路,經過大島和內布拉斯加州的重鎮哥侖布斯,再經過休列爾弗列蒙,最後到達奧馬哈。 -
Analysis of wireless flat surface train control system of mine railroad
礦山鐵路無線平面調車指揮系統探析
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