Bi Sheng invented the movable type printing after trying many times.

毕昇经过多次尝试，发明了活字印刷术。

The printing is also called the movable type printing (活字印刷).

印刷也称为活字印刷。

The movable type printing plays an important role in Chinese culture.

活字印刷在中国文化中起着重要的作用。

At the same time, the movable type printing was widely used in the world at that time.

与此同时，活字印刷在当时的世界上被广泛使用。

The last part of this thesis mainly discusses the reason of sluggish development of ancient Chinese movable-type printing.

第三部分则主要讨论了我国古代活字印刷发展滞缓的原因。