丝绸之路(the Silk Road)起源于公元前l世纪，是一条具有重要历史意义的国际贸易路线。由于

参考答案:The Silk Road is a historically important^①international trade route，which was originated^②during the Ast century BC. Because silk comprised a large proportion of^③trade along this road, in AHGG, it was named "the Silk Road" by Ferdinand von Richthofen, an eminent German geographer. It is not only an ancient international trade route, but also a splendid cultural bridge linking China, India, Persia, Greece and Rome, etc. It was through this bridge that^④the Four Great Inventions of China and religions of the West were introduced into each country．
答案解析:1．具有重要历史意义的：译为historically important。
2．起源于：译为originated。也可翻译为dated back to、dated from等。