从颗粒介质模型出发，对粮食中声传播性质进行了研究。
With kernel medium model, sound propagation characteristic in grain is studied.
同时，利用理论和数值相结合的方法计算和分析了热粘性效应对较粗管道中声传播的影响。
At the same time, a hybrid numerical and analytical method is used to calculate and analyse the visco-thermal effect on the sound propagation in wider ducts.
结果表明：空气中风速剖面和声速剖面对空气中声传播有很大影响，但对于透射进入水中的声波影响很小。
The results show that wind and the sound speed profile have little influence on air-to-water sound transmission.
根据连续分层介质中声波传播理论建立了计算水溶性高分子溶解过程中声衰减的数学模型。计算结果与实验结果一致。
Depending on the experimental result and the theory of sound wave propagation in layered medium, a mechanism of gradient water-soluble polymer solution was developed.
然后结合SYS-NOISE软件和AUTOSEA软件分别计算壳体在流场中声辐射效率在低频段和高频段时的频率响应。
Then, the radiation efficiency at low frequency and frequency response at high frequency in fluid are computed respectively by both SYSNOISE software and AUTOSEA software.
本文根据消声器在实际工作过程中声管内温度发生变化的特点，推导了考虑气流和线性温度梯度情况下刚性直管的声场传递矩阵。
The transmission matrix of rigid straight pipe with mean flow and linear temperature gradient is established according to the actual case of silencer.
总统在一片争论声中辞职。
在号角声中，他们阔步退下舞台。
该公司在一片欺诈的指责声中倒闭了。
舒尔曼有点厌烦了对全女子团队中的叽叽喳喳声。
Schulman is a little tired of the hoo-ha about the all-women team.
他们的脚步声在一片寂静中回荡着。
交响乐在响亮的乐曲声中结束。
卢克的脚步声渐渐消失在夜色中。
听众中爆发出一片欢呼喝彩声。
在更大的欢呼声中骑手们冲过来了，然后“嗖”的一声，就全都过去了！
Then came the riders amid even louder cheers and whoosh! It was all over.
他在一片倒彩声中退下舞台。
他“砰”的一声打开瓶塞，香槟酒从瓶中喷出。
He popped the cork and the champagne fizzed out over the bottle.
但在一片嘈杂声中，响起了一声尖锐的警告叫声。
在一片批评声中，法默向公众公开了这一项目。
Farmer has made the program publicly available, amid much criticism.
在一片喧嚣声中，人们很容易忘记美国历史是如何塑造这些辩论的。
Amid the din, it is easy to forget quite how American history has shaped these debates.
正是由于这种集声，即使是海洋中相对微弱的声音，尤其是低频声音，也能传播数千英里。
This focusing is the main reason that even relatively weak sounds in the ocean, especially low-frequency ones, can often travel thousands of miles.
他好像是死于一声枪响，但很早以前，他就已经在一声呜咽中死去了。
He might appear to have died with a bang, but he had long before died with a whimper.
在上面，一切都是那么寂静，空气中充满了尖叫声和钢铁的碰撞声。
Above, where all had been so still, the air was rent with shrieks and the clash of steel.
我一直没有忘记那个号码，它总会出现在记忆中，伴随着混乱的肮脏事情、欢声笑语和铁门的叮当声。
I have never forgotten that number, and it always comes to memory attended by gibbering obscenity, peals of joyless laughter and the clang of iron doors.
在它的号角声中，我斜视着秋日明媚的阳光。
At the blast of its horn, I squint into the bright autumn sun.
我们是在自己的哭声中来到人世的，又是在别人的哭泣声中告别这个世界的。
We come to this world with our cries and leave this world with others'cries.
我们有时在新闻和产品发布的喧嚣声中，倾向于忽略一些网上出现的重要事件。
Sometimes in the bustle of news and product launches, we tend to overlook some significant events that emerge from the net.
一阵表示敬佩的低沉的赞赏声在聚集的人群中传开。
仿佛是应了他的请求，空气中响起了他所听到过的最大的轰隆声。
As if in answer to his request, the air was rent by the most tremendous crash he had ever heard.
大多数组彼此之间的差别在统计上并不明显；然而，70分贝组的参与者——那些被置于类似咖啡店背景谈话声的噪音水平中的参与者——其表现明显好于其他组。
The differences between most of the groups were statistically insignificant; however, the participants in the 70 decibels group—those exposed to a level of noise similar to background chatter in a coffee shop—significantly outperformed the other groups.
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