Normally, "overview" is used before introducing the details to highlight the main points. "Summary" is used after discussing the details of a topic to review the main points. For example (At the start of a presentation, etc.) Here is an overview of what we will discuss today. This is a brief overview of my presentation.
KEGG（Kyoto Encyclopedia of Genes and Genomes）代谢通路中的"Global and overview maps"是一类特殊的通路图，它们提供了一个高级视角，展示了生物体代谢和信号转导的全局概览。 这些地图旨在概括多个具体代谢途径之间的关系，以及生物体中广泛存在的核心生物学过程。
