利用这些分子化石的特征讨论了恐龙生活时代的古环境特征。
The features of these molecular fossils are used to study the paleoenvironment during the dinosaur age.
扇三角洲砂体的沉积特征与碎屑供应、古地貌和沉积环境密切相关。
Character of fan delta sand body is confined by sediments resource, sedimentary landform, and sedimentary environment, etc.
特征指示种花粉雨研究，对古生态环境重建也具有重要的意义。
The study on pollen rain of characteristic indicator species has important significance for reconstructing paleo_ecological environment.
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