These provide base for the correct measurement and valuing of graptolite reflectivity.从而为笔石反射率的正确测定和取值奠定了基础.The black graptolite shale facies indicate a deep - water, half enclosed and anoxic sedimentary environment.中奥陶世...
Her expression gradually changing , Miss Su said, " What for?苏小姐脸色渐转道: “ 那又何必 呢 !" What for? " retorted Third Fairy.她说: “打听她做甚啦?He said cruelly, " What for?他很烦躁他说: “ 要他回家干什么?...