Because of its proximity to Earth's core, the rock at the base of the mantle is much hotter than rock in the upper mantle.

由于靠近地核，地幔底部的岩石比上地幔岩石的温度高得多。

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Base types define the core types from which all other types extend, and provide all common properties that the content will support.

基础类型定义所有其他类型从中扩展的核心类型，并提供内容支持的所有通用属性。

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Dijit builds on the base and core by providing a rich set of additional widget controls that are internationalized and enabled for accessibility.

Dijit 部分构建在基础和核心部分之上，提供了一组丰富的额外小部件控件，这些小部件控件被进行了国际化，并且已启用，可以被访问。

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Each piece starts with a flat wooden base and a core of hand-sculpted Styrofoam.

WSJ: If Kids Can Play, Will Mom Shop?

But more so than Bush, Perry has stronger bona fides with its hard core base of fiscal conservatives and the religious right.

FORBES: Perry Not Letting Anyone Run to His Right

Apple is targeting their hard-core base of media professionals and prosumers with messages of an improved photo and video playback and editing experience.

FORBES: Apple's New MacBook Pro a Boost for GPUs