例句與造句

1. On the west limb , there are andesite clasts at the lower section and limestone clasts at the upper section , which indicates normal stratigraphic sequence in its provenance . on the east limb , there are dolomite clasts at the lower section and limestone clasts at the upper section , which indicates reversed stratigraphic sequence in its provenance
   西翼礫巖在剖面上具明顯的倒序巖屑地層特征，反映了物源區(qū)正常的層序地層，而東翼礫巖在剖面上仍然是正序的巖屑地層，反映了物源區(qū)非正常的層序地層。
2. It's difficult to find reversed stratigraphic sequence in a sentence. 用reversed stratigraphic sequence造句挺難的