科学家根据那些化石的骨骼结构确定其年代.Scientists have dated the fossils by their bone structure.有两个因素对生物化石的保存是有利的.Tow factors are favorable for the preservation of organisms as fossils.它们是怎样变成化石的?How did they become fossils?...
We can gain the isochronous - modulus curves from the curves of stress - strain ratios.根据岩石蠕变的应力 - 应变比曲线可以近一步分析得到等时模量曲线.Isochronous stratigraphic interfaces are one of the most important marks of developing process of a ...