A key is the part of a pianoforte that you touch to make music.

琴键是钢琴上用手指部件,它能使钢琴发出乐音。

He is believed to be the inventor of the glass armonica, a sort of spinning glass organ.

据说他是玻璃琴（GlassArmonica）发明者，这是一种通过转动玻璃瓶发声乐器。

The engine is knocking.

发动机发出声音。

Repeated blows splintered the door. To

不断都打裂了。

Rain was drumming on the roof, wind fluting in the eaves of the cottage, sea performing glissandi with the beach.

雨，着屋顶，风，吹拂着房檐；大海与沙滩，合奏着轻音乐。

The flash of strobe lights and the insistent beat of the music made the disco a favorite gathering place for young people.

频闪灯亮光和音乐不断声使迪斯科舞厅成为年青人喜爱聚集地。

A typewriter is also appealing in its transparency — whack a key, and watch the typebar smack a letter onto a piece of paper.

打字机也以它透明操作流程博得人们眼球——键盘，目睹连动杆在一张纸上打出字母。