The hills sent back a faint echo.

座座山丘传来微弱的回声。

《牛津词典》

Usually, as they swim, they make clicking noises, and the resulting sound waves are reflected in an echo and travel back to them.

通常，当它们游泳时，会发出咔嚓的声音，所产生的声波会在回声中被反射回到它们身边。

youdao

That taught the little boy a lesson that our life is like an echo; we get back what we give.

这给我们一个同样的启示，即：生活就像一个回声，我们付出什么就能得到什么。

youdao

This I whispered,and an echo murmured back the word, "Lenore!"Merely this,and nothing more."

VOA: special.2009.02.02

This I whispered, and an echo murmured back the word,"Lenore!"

VOA: special.2010.10.31

But his healing hands soon also became indispensable to the Tsarina Alexandra who needed him to calm her nerves, cure her headaches, soothe her rages and echo back her own desires in the guise of the word of God.

ECONOMIST: Ra-Ra-Rasputin

His echo chamber sounded back his own ideas.

CNN: Don't be like Washington; listen to other views

Back in Washington, defence officials echo that line.

ECONOMIST: Punching through to Baghdad