求翻译：第三次发掘在2000年底就进行了，发掘面积扩大到了500平方米。从考古学意义上来说：“收获极其丰富”。出土了经鉴定属于龙山文化类型的器物，留下了上海的先民同中原的移民一起生活的印记。是什么意思？

Third time to explore the conduct of the end of 2000, the excavation area expanded to 500 square meters. From the archaeological sense: "Harvest is extremely rich." Unearthed by the identification of types of objects belonging to the Longshan culture, the ancestors left Shanghai Zhongyuan immigrants

At the end of the year 2000 the first 3 times on the discovery, excavation area has been expanded to 500 square meters. from archaeological sense: "harvest" is extremely rich. Longshan culture was unearthed from the identified types of artifacts belonging to the ancestors left Shanghai Zhongyuan imm

Third excavating has carried on in 2000 year's end, the excavating area expanded 500 square meters.From the archaeology significance: “The harvest is extremely rich”.Unearthed belonged to the Longshan culture type utensil after the appraisal, has left behind Shanghai's ancients the mark which lives

Third archaeological unearthing the end of 2000, excavation area has expanded to 500 square meters. Archaeological sense: "extremely rich harvest". Unearthed artifacts, as identification of the Longshan culture type, leaving Shanghai ancestors of immigrants live with mark with the Central Plains.

正在翻译，请等待...