Chaucer wrote in the late mediaeval period.

乔叟写作的时代是中世纪末。

The pictures there were all about mediaeval art.

画廊里的画都是关于中古时期艺术。

It has the appearance, especially from a distance, of a mediaeval fortress.

它有中古世纪堡垒的外观，特别是从远出看。

Therefore, the small country still stays in the life style of mediaeval century.

因此，这个小国目前仍处在中古世纪的生活状态中。

This paper mainly discusses the comparative sentence "Fang" of mediaeval Chinese.

本文研究的是中古汉语表示比较的方字句。