Only the hills sent a faint echo back.

只有山丘传来的隐约的。

These species use echolocation to find their way and identify food.

这类物种利定位来寻找方向和识别食物。

The returning echoes show where these objects are located.

返的能表明这些物体的位置。

The lake echoed with the sound.

湖上荡起了。

OCT is a form of optical echolocation.

OCT的理是光学定位。

Like bats, they use echolocation to navigate.

和蝙蝠一样，它们也利定位来导。

That, my son, is an echo.

孩子，这就是。

Did you never hear an echo? asked his mother.

“你难道从没听说过？”

It's a book that resounds with reality.

这本书的每一页都是冷酷现实的。

Think of it like echolocation with a melody.

把它想象成带有旋律的定位。

You walk in and it's big, and there's a echo.

你走进去，里面很大，有。

And the reverberation results from the vibrations that linger when the tissues pull apart.

而则来源于组织分离时产生的振动。

But they guessed correctly 80 percent of the time when the object was diagonally behind them.

但是，当物体位于定位仪斜后方时，定位仪的检测准确率高达80%。

The bat judges distances by a kind of echo-location.

蝙蝠一种测定法来判断距离。

Exactly, the key is receiving the reflected echo of the sound.

没错，关键是接收到音的反射。

Bellatrix hit him across the face: the blow echoed around the room.

房间四周立刻响起了。

That glow is the echo of matter moving faster than light speed.

这种光是物质以比光速更快的速度运动的。

To produce echoes that more accurately reflect the world.

这种方法来产生能更精确反应世界的。

At this point, the zombies rely on echolocation after losing their sight.

在这一阶段，僵尸失去视力后依靠定位。

(Echoes) And at the bottom of that cave is an X marks the spot.

（）洞穴的底部有一个标记地点的大叉。