These Raptors could pick up low frequency sound.

这些迅猛龙可以听到低声。

And we see this lower frequency formant here.

们可以看到这个低共振峰。

And the areas with the longer fibers resonate with lower-frequency waves.

纤维较长区域与低波共振。

So they broke out a set of very very low frequency speakers.

他们搞出了一套非常非常低扬声器。

So the way we're going to do this is we're going to listen to the low end first.

们做法是先来听一下低。

Although we can't hear these low sounds, we can feel them.

虽然们听不见这些低声，们能感觉到。

At the lower end of the spectrum, there's radio, infrared, and visible light.

在光谱低是无线电，红外线，和可见光。

Low-frequency noise, in particular, just goes through the trees as though they aren't there.

特别是低噪无视树木存在，直接穿过他们释放出来。

They're particularly well-tuned to low frequencies, including those emitted by dying fish.

听觉达到了水下800米以远，尤其能够识别低声波。

Now they knew lower frequency words but they hadn't mastered those most important words.

他们知道低词，是他们还没有掌握那些最重要单词。

At the other end, in the deep infrasound, elephants and whales, tigers and some birds make sound.

另一低次声，大象、鲸鱼、老虎和一些鸟类会制造这样声。

We register short waves at high frequencies as bluish colors, while long, low frequencies look reddish to us.

们将高短波记录为蓝色，而长低在们看来是红色。

Over a combined total of 26 hours, 32 calls were captured—including some low-pitched pulses.

总计超过26小时记录时间内，一共收到32个声文件—包括了一些低声波脉冲信号。

This could be triggered by low or high-frequency vibrations, a stretch, or simply light, static pressure.

这可能会由低或高感受、拉伸，或仅仅由轻微静态压力所引发。

Even more effective, low-frequency sounds, with their long wavelengths, travel much further than high frequencies.

更有效是，低声波长较长，比高声传播得更远。

Here we are referring to high and low frequency words - so it means how often they occur.

这里们指是高词和低词——所以它指是它们多久出现一次。

Developed by professor David Premack, the Premack principle states, " More probable behaviors will reinforce less probable behaviors."

由大卫·普雷马克教授提出普雷马克原理指出：“高行为会强化低行为。”

For Parasaurolophus, genetic modifications over time give them the tools both to pick up and emit these low-frequency sounds.

对副栉龙来说，长期基因变化使它们拥有了学习和模仿这些低声工具。

Professor Webb spoke there about research that showed students knew lower frequency words but weren't learning enough high frequency words.

韦伯教授刚才说了关于表明学生知道低词却没有学习足够高词研究。

Growling is quite a distinct sound, and other animals that are much larger use low-pitched sounds, when they're being threatening.

嚎叫是非常特殊声，其他大型动物在感受到威胁时，会使用低声。