There was an echo on the line and I couldn't hear clearly.

电话里有回音，我听不清楚。

No footfalls echo on the floor.

地板上不再有足音回荡。

And a star will brighten the sky; songs of joy will echo on high!

又有景星照耀天空，喜乐之歌响彻高处！

And in the echo wall of history the sound of my laughter will echo on.

在历史的回音壁内，你定会听到我的笑声！

We use an application called echo on a mainframe that echoes back the input text entered in the first screen.

我们在大型机上使用一个称为echo的应用程序，它能对输入第一个屏幕的输入文本进行回显。