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。
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。
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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