除了头上的一个屋顶，桌上的一些事物，身上的几件衣服，一些交通工具，几本书，和一台能让我工作的电脑——还有什么是真正必需的？
Other than a roof over my head, some food on the table, clothes on my back, some means of transportation, some of my books, and a computer so I can do my job - what else is truly necessary?
严禁抛掷钢管、钢筋、扳手等材料和工具，以免破坏屋顶防水层。
It is forbidden to throw steel pipe, steel, wrenches and other materials and tools, so as not to destroy the waterproof layer.
这一步操作很简单，只需将所有屋顶用多边形工具选出，然后用笔刷工具把它们涂白。
This step simply involved selecting each section of the roofs with the polygonal tool and painting them white with the brush tool.
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