这石斧是古代的遗物.This stone axe is a relic of ancient times.农夫们偶尔能犁出古老的印第安人遗物.Farmers occasionally plough up old Indian relics.这种古玩被认为是11世纪的遗物.The antique is assigned to the eleventh Century....
For multi - object contact problem in rolling engineering, the accuracy of disaggregation mathematical method is low.在多物体同时接触轧制工程问题中,对各物体抽象出来研究存在简化较多 、 计算精度低等缺点....