余音

gē shēng zài wǒ ěr biān yú yīn liáo rào

歌声在我耳边余音缭绕。

The voice of singing lingers in my ears.

gāng qín yú yīn de cún zài shì bì rán de yě shì bì xū de

钢琴余音的存在是必然的，也是必须的。

The existence of residual sound of a piano is inevitable and necessary.