敲击

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

琴键是钢琴上用手指的部件,它能使钢琴出乐音。

The engine is knocking.

出的音。

Repeated blows splintered the door. To

不断的把门都打裂了。

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

据说他是玻琴（GlassArmonica）的明者，这是一种通过转的玻瓶的乐器。

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.

频闪灯的亮光和音乐不断的使迪斯科舞厅成为年青人喜爱的聚集地。

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

打字也以它透明的操作流程博得人们的眼球——键盘，目睹连杆在一张纸上打出字母。