These Raptors could pick up low frequency sound.

这些迅猛龙可以听到低声音。

And we see this lower frequency formant here.

我们可以看到这个低共振峰。

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

纤维较长的区域与低波共振。

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

他们搞出了一套非常非常低的扬声器。

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

我们的做法是先来听一下低。

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

我们听不见这些低的声音，但我们能感觉到。

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

在光谱的低端的是无线电，红外线，和可见光。

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

特别是低噪音无视树木的存在，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，但是他们还没有掌握那些最重要的单词。

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

另一端的低次声，大象、鲸鱼、老虎和一些鸟类会制造这样的声音。

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

我们将高的短波记录为蓝色，而长的低在我们看来是红色的。

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

总计超过26小时的记录时间内，一共收到32个声音文件—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.

这可能会由低或高的感受、拉伸，或仅仅由轻微的静态压力所引发。

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

更有效的是，低声音波长较长，比高声音传播得更远。

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

这里我们指的是高词和低词——所以它指的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·普雷马克教授提出的普雷马克原理指出：“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，长期的基因变化使它们拥有了学习和模仿这些低声音的工具。

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的高词的研究。

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

嚎叫是非常特殊的声音，其他大型动物在感受到威胁时，会使用低的声音。