例句
This achievement provides the microfossil materials for the study of the lower ordovician in Northern Guizhou.
这一成果对于贵州北部下奥陶统的研究，提供了微体化石资料。
This achievement provides the microfossil materials for the study of the lower ordovician in Northern Guizhou.
这一成果对于贵州北部下奥陶统的研究，提供了微体化石资料。