I discovered my floormates click-clacking away at mah-jongg.

我发现那层的楼友霹雳啪啦地打麻将。

What's that furious clacking sound I hear?

我听到的愤怒噼啪声是什么？

I heard the typewriter clacking in the next office.

我听见隔壁办公室中打字机发出嗒嗒的声音。

Is not a social person, unexpectedly clacking Lao society.

不是社会人，竟唠社会嗑。

All I could hear was the steady clacking of a solitary typewriter.

我所能听到的一切是一部孤零零的打字机不断发出的噼啪声。