So, the echoes from a tree are going to a mass of chaotic acoustic reflections, not like the echo from a moth.

所以，树的回声会是一团混乱的声波反射，而不像飞蛾的回声那样。

youdao

These just fade out on shallow beaches, so the whale doesn't hear an echo and it crashes onto the shore.

这些声音在浅滩上逐渐消失，所以鲸鱼没有听到回声，就撞到了岸边。

youdao

So was born the echo-sounding apparatus, now in general use in ships.

这样就产生了目前各种船舶上普遍应用的回声探测仪。

youdao

"We made some goofs that were kind of interesting,". "We didn't make the hallway wide enough to get a piano down, we forgot to put AC outlets in one of the studios, and we completely forgot the echo chambers, so we had to put them under the parking lot.

VOA: standard.2009.08.14

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