例句與造句

1. He completed his PhD at the University of Western Australia in 1983 on continental shelf sedimentation.
2. Major iron formations in different parts of the basin represent either nearly contemporaneous shelf sedimentation on either side of the main basin, or deposits formed simultaneously in isolated sub-basins of the main basin.
3. It's difficult to find shelf sedimentation in a sentence. 用shelf sedimentation造句挺難的