让我们来谈谈声谱的另一端，人类听不到的声音——超声波。
Let's talk about the other end of the acoustical spectrum, sound that is too high for humans to hear—ultrasound.
这些回声人类是听不到的，但对蝙蝠来说，却是真正的“如雷贯耳”。
Much of that echolocation sound is beyond the range of the human ear. But to bats, it's as loud as a jet airplane.
我们要先“看到眼睛看不到的，听到耳朵听不到的”，然后再做出判断。
We set aside our judgments in order to "see what eyes have not seen and ears cannot hear" I Cor.
声频设备设计的初衷，是使所有的失真都低到一个耳朵听不到的程度上。
The design goal for audio equipment is that all distortion be so low in level it can't be heard.
有些存在，其实依然徘徊，我不过是习惯一个人对着墙说着那些你听不到的对白。
Some, in fact still linger, I just used to a man said to the wall with those you can't hear the dialogue.
犯罪者们总是互相支持，对旁观者充满敌意和怀疑，而受害者的声音是听不到的。
The perpetrators always encourage each other and regard the bystanders with suspicion and hostility, and the victims' voices cannot be heard.
诱饵应该是—些零碎有用的信息，而这些信息是人们在平常的生活中是听不到的。
The hook should be a little nugget of information which is something out of the ordinary that people wouldn't ordinarily hear during a conversation.
旁白：在戏剧中低声说出或直接说给观众的台词。旁白在舞台上其他人物是听不到的。
Aside: in drama, lines spoken by a character in an undertone or directly to the audience. An aside is meant to be unheard by the other characters onstage.
听力的练习对我们很重要，因为，耳朵听不到的聋哑残疾人不可能会说出地道的普通话。
Practice of listening comprehension is very important for us English learners. The deaf people can't speak well, because they never heard before.
它通过振动双颊来发出人类听不到的超声波。它通过不同节奏的超声波来与同伴们交流。
Otamaro 535: It vibrates its cheeks and emits sound waves that are inaudible to humans. It communicates with the sound waves' rhythm.
Herzing博士认为很多信息可能都被编码成这类声音，包括海豚的一些人类听不到的超声波。
Herzing believes that much information may be encoded in these sounds, as well as in dolphins' ultra-high frequencies, which humans cannot hear.
处于危险情况下的小老鼠能发出人类听不到的超声波，母老鼠在远处也能听到这些声音，然后它就赶快跑回来保护自己的孩子。
Young mice in danger can make ultrasonic sounds that the human ear cannot detect. The mother mouse can hear these sounds from a distance. Then she hurries back to protect her babies.
“是啊，”他轻声说道，声音轻得我几乎听不到他的回答。
"Yes," he muttered, his voice so muted I hardly heard his reply.
如果你在公路上跑，带个耳机是非常危险的，因为你可能听不到一辆汽车已经跟在你的身后。
If you run on the road, headphones can be dangerous, as you might not hear traffic coming your way.
自从他们开工以后，他们的声响太吵了，搞得我们听不到自己唱歌的声音了。
Ever since they started working on it, it's been so noisy we can barely hear ourselves sing.
如果他整夜都待在落叶松的树林中，他就听不到田庄里的骚动。
If he had remained among the larches all night, he would have heard nothing of the stir at the Grange.
你看不见它，闻不到它，也听不到它，并且人们对于如何准确地定义它，或者查明它的来源也存在分歧。
You can't see it, smell it, or hear it, and people disagree on how precisely to define it, or where exactly it comes from.
当她早上醒来，听不到枞树的轰鸣声时，她会想知道自己在哪里。
When she woke up in the morning and could not hear the fir-trees roar, she would wonder where she was.
过了一会儿，我再也听不到意大利人美妙浪漫的声音了。
After a while, I heard no more of the romantic-sounding Italians.
虽然他们听不到，但他们的大脑没有问题。
Although they can't hear you, there's nothing wrong with their brain.
在他的晚年生活中，他什么也听不到，却写出了伟大的音乐作品。
He couldn't hear anything in his later life and wrote great musical works.
你的狗在叫，但你听不到！
换句话说，你的耳朵能持续听到声音，但只是因为你的大脑忽略了它们你才听不到。
In other words, your ears continue hearing sounds, but you can't hear the sounds just because your brain ignores them.
在杰克生日那天，镇上的每个人都会戴上耳塞，这样他们也听不到任何声音。
On Jack's birthday, everyone in town would wear earplugs so that they couldn't hear anything either.
这群科学家称，植物并不像我们一直以为的那般安静，事实上，它们的声音频率极高，高到我们根本听不到。
The group of scientists said that plants are not as quiet as we had always thought, but in fact their voices are so high-pitched that we just can't hear them.
周三仅有五人被救出，并且救援者说从早上起已经听不到求救的声音。
Only five had been rescued by Wednesday, and rescuers say they have heard no cries since the morning.
他把头埋进枕头，这样他就可以听不到父母吵架的声音了。
He covers his head with his pillow so he doesn't have to listen to the sound of his parents arguing.
但是，这里你听不到嗡嗡而过的雄心壮志。
除了黑鸟和麻雀，见不到其它的身影；除了蝴蝶扇动翅膀，听不到其它的声音。
There is nothing to see except blackbirds and sparrows; nothing to hear except the noise of butterflies\' wings.
电话中稍加一点背景噪音，我们的耳朵就听不到电话中的回声。
A bit of background noise on the phone enables our ears to filter out echoes.
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