轻敲

Charlotte rapped on the window with her knuckles.

夏洛特用指节着窗户。

Think of the transfixingly strange Scherzo of the Fifth Symphony, when the music effectively stops moving and the timpanist drums lightly on the note C like a finger tapping on a pane.

想想第五交响曲谐谑曲中奇怪终止地方，当乐突然停止时，定手出C，就像用手指方格一样。