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

琴键是钢琴上用手指敲部件,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.

据说他是琴（GlassArmonica）发明者，这是一种通过敲转动瓶发声乐器。

The engine is knocking.

发动机发出敲声音。

Repeated blows splintered the door. To

不断敲把门都打裂了。

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

雨，敲着屋顶，风，吹拂着房檐；大海，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敲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——敲键盘，目睹连动杆在一张纸上敲打出字母。