If you want to hum the piece quietly to yourself, that's fine; that's good.

如果你想自己跟着曲子,小声哼哼,没问题,那很好

聆听音乐课程节选 : 耶鲁公开课

If I hear lots of buzzing out there, that means you're into it, so hum the piece a little bit to yourself, Musorgsky's "Great Gate of Kiev" Here and Pictures at an Exhibition and see if you can write down those particular symbols.

如果我听到了很多嗡嗡声,就说明你们都投入进去了,那就自己跟着曲子小声哼哼吧,穆索尔斯基的《基辅的城门》,以及《图画展览会》,看看你是否可以写下那些特殊符号来

聆听音乐课程节选 : 耶鲁公开课