Components

组件是一组功能，它们可以是内置的，或者是你为了自己的需要重新使用或扩展的。此处所讨论的组件可以是 commands 内置组件，或者是在命令本身中提供更高级别功能的 UI 侧组件。

Components are a set of features which are either build-in or something you can re-use or extend for your own needs. Components in question are either built-in commands or UI side components providing higher level features within commands itself.