Pencil can also be used as a simple drawing program with standard design tools like pen, brush, paint bucket and more with an unlimited canvas space.
Pencil也可以被作为一个简单的图形设计工具，它有画笔、刷子、油漆桶和一个不限大小的画布。
A strong bag, bucket or similar container should be used together with a rope to hoist and lower tools.
利用结实的口袋、提桶或类似容器，系上绳索来提起或下放工具。
Code on the tools directory is responsible for tying a tool functionality, like paintbrush or bucket-fill, to the use interface.
tools目录中的代码负责将一个工具功能(比如paintbrush或bucket - fill)绑定到用户界面。
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