sedimentary systems tracts 沉积体系域
depositional systems tracts 沉积体系域
sequences and systems tracts 层序和体系域
The present paper deals with the Cambrian sequence stratigraphic framework, sequence boundaries, sequence patterns and systems tracts, in the middle Yangtze area.
笔者建立了中扬子区寒武系层序地层格架，研究了中扬子区层序界面和体系域特点，分析了中扬子区层序样式的基本类型及其特征。
The range through these states is mediated by the arousal system, a network of tracts converging from sensory systems to integrating centers in the brain stem.
这些状态的变化是以激发系统作为媒介完成的，而所谓激发系统，是指从各个感觉系统汇聚到位于脑干中整合中心的一个网络。
Lake basin sequence is formed through and sedimentation, showing the changes of the sedimentary systems or system tracts in time and space with the lake level variation.
湖盆层序是指在湖盆地内由沉积作用形成的一类层序，表现为随湖水面的升降变化沉积体系或体系域在时空上的变化。
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