它为什么会发出这种声音呢？
整排窗子都发出这种声音直到灯都亮了，一切好像葬礼。
The scraping sound went along the whole row of windows until the lamps were burning as if at a funeral.
狗狗欢迎其他的狗狗或者人的时候也会发出这种声音。
其它夜食动物如麝香猫、獴和土狼也偶尔发出这种声音。
Other nocturnal solitary predators such as civets, mongooses and even hyenas are known to purr occasionally.
而且，据我所知，发出这种声音的唯一理由是因为那里有一只蜜蜂。
And the only reason for making a buzzing-noise that I know of, is because you're a bee.
实际上，你可以使用任何单词或声音，只要你能自始至终轻松、一贯的发出这种声音。
The fact is you can use any word or sound you are comfortable with as long as you are consistent.
海豚另一有名的特点是它们可以使用独特的像声波定位器一样的敲击声来确定食物和障碍物的位置，每一头海豚都有自己与众不同的声音，他们靠发出这种声音互相交流。
They are well-known for the unique clicking sound they use like sonar to locate food as well as obstacles. Every dolphin has its distinctive individual whistling sound used for communication.
一名男子发出了独特的呻吟声，从椅子上摔了下来，后来一名医生解释说，人晕倒前总是发出这种含混不清的的声音。
After a man made the distinctive groan and tumbled out of his chair, a doctor explained the garbled noise that always came before the fall.
我是说这种工具声音不会很大；它发出的声音很小，你得倾身细听。
What I mean is that this tool doesn't speak loudly; it whispers, and you have to lean forward to hear it.
“蚊子”是一种能发出尖锐声音的设备，而这种频率的声音只能被年轻人听到，被设计用于对付亢奋的年轻人，阻止他们继续在街上活动。
The Mosquito, a device that emits a screeching sound at a pitch heard only by young people, is designed to so irritate youths that it deters them from loitering.
这种蝌蚪通过将空气从肺中挤出，来发出声音。
The tadpole produce the sound by pushing air out of their lungs.
但根据芬克博士的设想，用这种纤维织成的材料将能够连续监测身体发出的声音，继而为健康监测提供依据。
But Dr Fink imagines that fabrics woven from these fibres would be capable of continuously monitoring the sounds of the body for health screening.
这种装置能将100分贝左右的声音转换成轻微的电流，100分贝相当于嘈杂的车流、一辆疾驰的火车或者附近剪草机工作时发出的噪音。
The device can convert sounds of around 100 decibels -the equivalent of noisy traffic, a passing train or a nearby lawnmower -into a mild electrical current.
长程音波设备(声弹)，简称为LRAD，发出声波的声音足够大以至于可以刺痛人并造成不可弥补的损害，这种设备可以用于阻止海盗。
Long range acoustic devices, or LRADs, emit sound waves loud enough to cause pain and permanent damage that could be directed towards the pirates.
最近的研究表明，这种鸟类的雄鸟在捕食者发出警告声音后，发起行动以引起获取雌鸟的关注。
It turns out that males get the attention of potential mates by making their move after a predator announces its presence.
这种塑料喇叭成为南非世界杯的一个印记，它所发出的单调的嗡嗡声成为每场比赛的背景声音。
The plastic horns became a hallmarkof the World Cup in South Africa, producing a monotonous droning sound which provided a backdropfor every match.
但科学家不知道它们为什么发出这样的声音，因此研究人员对这种发音行为进行了研究。
But they hadn't known what these sounds were for. So researchers examined how the vocalizations might correspond with behavior.
我们通过声带(由此而命名)发出声音，这种笑通常是自然而本能地发出的。
We create the sound with our vocal chords (hence the name), and usually laugh this way naturally and spontaneously.
如果能够证明人耳发出的这种声音乃是个人独有的，即可极大地提高接听中心以及银行电话交易的安全性，免去记忆众多个人密码的麻烦。
If those noises prove unique to each individual, it could boost the security of call-centre and telephone-banking transactions and reduce the need for people to remember numerous identification codes.
这种“服装麦克风”当然可以录下讲话，也可通过侦测人体发出的几乎难以察觉的声音来监测穿着者的健康状况。
The clothing mic could capture speech, sure.But it could also monitor health by detecting almost imperceptible sounds from the body.
它无法解释为什么遇到不一致时，我们会发出这种大声的声音。
It doesn't explain why we make that loud noise when dealing with incongruity.
海豹会长时间的保持一种音调，在很远的地方你就能听到，这种声音类似于火车快进站时鸣笛被塞住时发出的闷响声。
A seal can make and hold a single note for what seems like an indefinite period. You hear it in the distance and it sounds like a railroad train with its whistle stuck at a nearby station.
在这种情况下，代理可以在电压正常时发出低沉的声音，而在出现问题是发出高亢的声音。
The agent in this case can play a low sound while voltage is within correct parameters and a high-pitched sound when a problem occurs.
这种鸟一直没有被发现主要有两个原因：很少有人敢冒险进入这个他们认为很神圣的山脉，另外一个原因就是这种鸟与其它蜜雀不同，它们天性沉默，很少发出声音。
The bird avoided detection for so long for two reasons: Few villagers had ventured into what they consider sacred mountains, and the species—unusual among honeyeaters—doesn't make much noise.
除了我们人类能听得见的吱吱声，老鼠还发出超声波——这种声音的分贝很高，人耳无法听到。
In addition to audible squeaks, mice produce ultrasonic noises-squeaks so high that humans cannot hear them.
能够发出声音的往往是昆虫幼虫，它们生活在陆地上，在空气中制造出声音，而不是像这种蝌蚪一样在水下发出声音。
Those that do tend to be insect larvae, which live on land, making their sounds into the air rather than underwater.
这个研究组已经发现，和这种会唱歌的老鼠一起长大的普通老鼠，能够发出几个与一般鼠的叫声不同的声音，这证明了“唱歌”这种交流方式在小组范围内是可以传播的，就好像方言一样。
The team has found that ordinary mice that grew up with singing mice emitted fewer ultrasounds than others, which could indicate that communication methods can spread in the same group like a dialect.
普尔还表示，米爱卡这个象群中的其它成员也被人们发现能够发出类似的声音，而这种声音和以前曾记录在案的任何一种大象的叫声都明显不同。
Poole said others in Mlaika's group have been heard to make a similar noise, which is quite different from any call previously recorded in elephants.
普尔还表示，米爱卡这个象群中的其它成员也被人们发现能够发出类似的声音，而这种声音和以前曾记录在案的任何一种大象的叫声都明显不同。
Poole said others in Mlaika's group have been heard to make a similar noise, which is quite different from any call previously recorded in elephants.
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