Spatial data model is the core and base of three dimensional geographic information system design.

空间数据模型是地理信息系统设计的核心和基础。

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Ren is the basic content of Confucius ideological system, as well as the core and base of his moral education.

“仁”是孔子整个思想体系的基本内容，也是其道德教育的核心与基础。

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Traditional heat meter is an integral structure of integraph, machine core and base, and it is uneconomical in use.

传统的热量表机芯、积分仪和基表结合为一体，这种结构对表的检测和维修都是不经济的。

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For my artists, their fans that follow and interact on Facebook, Twitter and Instagram is their core fan base that lives and breathes with them on a daily level.

FORBES: Why Conan Is The Musician's Best Bet?On Late Night Television

"The market for BlackBerry is our core customer base and that's what we've targeted, " said RIM president Mike Lazaridis.

CNN: How BlackBerry conquered the world

Obviously Project Eternity has shown us that a company can successfully drive their way to Kickstarter success without much to show, but Obsidian comes at this from a unique perch, with many beloved titles under their belt and a core fan-base.

FORBES: 'Elite: Dangerous' Spins Back On Course After Lackluster Kickstarter Start