毕升于1041年发明活字印刷术。

Movable type printing was invented in the eleventh century.

公元1041年毕升发明活字印刷术取代刻版印刷。

AD 1041. Bi Sheng invented the art of letter-press printing.

毕升活字印刷出书成功，但他的技术直到1298年才得以完善。

Though used successfully to produce books, his technology was not perfected until 1298.

到了900多年前的北宋时期，平民发明家毕升，经过反复试验，发明了活字印刷术。

During Northern Song Dynasty more than 900 years ago, Bi Sheng invented movable-type printing after years of experimenting.

其中，东汉时期的蔡伦（AD25-220）被认为是造纸术的发明者，北宋时期的毕升（960-1127）是活字印刷术的发明者。

It is generally assumed that Cai Lun of the Eastern Han Dynasty (AD 25-220) was the inventor of plant-fiber paper. Bi Sheng in the Northern Song Dynasty (960-1127) invented movable clay printing.