前者可以在 Eclipse.org 站点上找到，后者可以利用本教程底部的链接作为 RAS 资产来下载并安装。
The former can be found on the Eclipse.org website, and the latter can be downloaded and installed as a RAS asset using the link at the bottom of this tutorial.
前者可以在Eclipse.org站点上找到，后者可以利用本教程底部的链接作为RAS资产来下载并安装。
The former can be found on the Eclipse.org website, and the latter can be downloaded and installed as a RAS (Reusable asset Specification) asset using the link at the bottom of this article.
有两种抽象层：硬件抽象层及平台抽象层，前者的必要性显而易见，而后者的目的是充分利用平台所提供的最佳特性。
There are two kinds of abstraction layers: a hardware one, and its necessity is obvious, then there is a platform abstraction layer to make use of the best features a platform provides.
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