声纳所使用的频率从次声到超声不等。
The frequencies used in sonar systems vary from infrasonic to ultrasonic.
目的研究次声对大鼠血液流变特性的影响。
AIM To study the effect of infrasound on the hemorheology of rats.
结果随次声作用次数增加，脑超微结构损害愈重；
Results With increase in the times of infrasonic damage, cerebral ultrastructure became more aggravated.
在太平洋里大洋涌(长浪)次声观测：译解海地歌曲。
Infrasonic observations of open ocean swells in the Pacific: Deciphering the song of the sea.
背景：次声暴露导致大鼠血-视网膜屏障通透性增加。
BACKGROUND: the permeability of blood retinal barrier in rats can be increased due to the exposure under infrasound.
通古斯爆炸包含了地震波和次声扰乱，被世界各地记录下来。
The Tunguska event included seismic waves and infrasonic disturbances that were recorded around the world.
次声的作用机理是生物共振，次声应用于生物医学，前景将会十分广阔。
Being inaudible and with a mechanism of bio-resonance, infrasound has a brilliant perspective when applied to biomedicine.
次声监测台阵结构的合理设计是抑制环境噪声及增强目标次声信号的一种有效手段。
Proper structure design of the infrasonic monitoring arrays is an effective means to restrain the environment noise and enhance the target infrasonic signal.
在相同的频率和声压级水平下，次声的损伤作用与次声的暴露时间并非呈线性关系。
Under the same frequency and same sound pressure level, the infrasound damage on the brain didn't show linear correlation with the acting time of infrasound.
目的：研究慢性次声作用后对小鼠海马内白细胞介素- 6 (IL - 6)的影响。
Objective: to study effects on the expression of interleukin-6 (IL-6) in the hippocampus of the mouse exposure to chronic infrasound.
结果：与正常对照组大鼠相比，次声组海马细胞凋亡率和坏死率显著升高（P0.05）。
Result:Compared with normal control group, apoptosis and necrosis rates of hippocampal cells in infrasound group increased significantly(P0.05).
1972年，巴黎国际噪声专业会议正式确定了次声的定义，并对次声的暴露标准展开讨论。
In 1972, Paris International Noise Professional Meeting gave a formal definition of infrasound, and discussed its exposure standards.
因此，研究次声的发生、传播、生物学作用机制及制订相应的防护措施已越来越受到人们的重视。
So people are becoming increasingly aware of the importance in studying the mechanisms of the occurrence, spreading, biological effects and preventive measures of the infrasound.
目的观察慢性次声暴露对豚鼠听觉传出通路中重要的神经递质降钙素基因相关肽(CGRP)分布的影响。
AIM to explore the effects of infrasound on the distributions of CGRP IR in the efferent auditory pathways in guinea pigs.
电话响了3次后我听到了咔嗒一声响，然后是她的录音留言。
The telephone rang three times before I heard a click and then her recorded voice.
他在一次电视讲话中发表了这一声明。
他一次又一次地呼唤他的小朋友，突然他听到沉重的脚步声向他走来。
Again and again he called to his little friend, when suddenly he heard heavy steps approaching.
公路上有挡泥板的断裂声和油漆的刮擦声，这种小事故每天都会在路上发生成千上万次。
There was a crack of fenders and the sound of paintwork being scraped, the kind of minor mishap that occurs on roads thousands of times every day.
眨两次眼睛，你的相机会“咔嚓”一声！
Open and close your eyes twice and your camera will go "click"!
这是我第一次学歌学得这么艰难，因为我在换成头声唱歌时破音了。
This was the first time I struggled to learn a song, because my voice cracked as I switched to a head voice.
我能够听见外面，每一次大风的呼啸，每一次狗吠，每一次从人行道穿过街道的脚步声。
I could hear every gust of wind outside, every dog barking, every footstep on the sidewalk across the street.
每一次有机会来加强这一名声都令我高兴。
I am pleased by every opportunity to enhance this reputation.
并无利爪的杰克猫在树下发出嘶嘶声，迫使那只熊在树上躲避了15分钟，然后在一次尝试逃跑失败之后逃到了另外一棵树上。
Hissing at the base of the tree, Jack the clawless cat kept the bear at bay for about 15 minutes, then ran him up another tree after an attempted escape.
他悄悄爬过舞台，举起了锤头，一次没敲中，第二次也没敲中；忽然一声巨响！
He crept across the stage; he raised the hammer; missed once; missed twice; then a huge bang!
这时，他才从梦中渐渐清醒过来，一声和第一次相同的响声把他完全惊醒了，他注意看，这才看出那两颗星原来是一辆车子上的挂灯。
But this confusion vanished; a second sound similar to the first roused him thoroughly; he looked and recognized the fact that these two stars were the lanterns of a carriage.
“对我、对美国而言，这都是一次机会，让我们能够向这个国家以及全世界最优秀的公民说声‘谢谢’，”他说道。
"This is a chance for me and for the United States of America to say thank you to some of the finest citizens of this country, and of all countries," he said.
我试图跟随那轻柔的滴答声，在一次钟鸣声和下次的钟鸣声之间数出九百秒，但我总是数不清。
I tried to follow its soft ticking and to count the nine hundred seconds between one stroke and the next, but I kept losing track.
他说，听见了两次巨大的爆炸声当飞机撞向地面的时候。
He said there were two loud explosions when the aircraft hit the ground.
要有多少次重复地听到相同的笑话时挤出一声大笑？
Just how many times can hear the same joke and force out a laugh?
要有多少次重复地听到相同的笑话时挤出一声大笑？
Just how many times can hear the same joke and force out a laugh?
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