1、Ravenna is famous for its well-preserved mosaics from the 5th and 6th centuries.
拉文纳以其保存完好的5至6世纪的马赛克而闻名。

2、I visited Ravenna last summer and was amazed by the beautiful Byzantine architecture.
我去年夏天参观了拉文纳，并对那里美丽的拜占庭建筑感到惊叹。