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

电话里有回音，我听不清楚。

《牛津词典》

No footfalls echo on the floor.

地板上不再有足音回荡。

youdao

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！

youdao

As the president continued his cross-country appeals on health care reform, partisan disagreements continued to echo on Capitol Hill.

VOA: standard.2010.03.10

This echo effect can be heard on the recording of this huge hit for the Supremes in nineteen sixty-four, "Where Did Our Love Go?"

VOA: special.2009.05.11

Hit the source links for all of the details and expect more info on how the Echo puts Android on your HDTV soon.

ENGADGET: Ceton releases Windows 8 drivers, Echo set-top box is getting Android inside for the holidays

The Echo, on the other hand, kept up with no hint of UI lag.

ENGADGET: Ceton Echo Windows Media Center Extender review HD

Mr Williams is now in contention for the UK Unsung Hero award made at Liverpool's Echo Arena on Sunday 14 December.

BBC: Williams awarded BBC Wales crown