我的方法是，从左到右，从上到下对谜板进行扫描(两遍，这是为了得到垂直方向和水平方向的词)。
Instead, I scan the board from left to right and top to bottom (twice, to get both horizontal and vertical words).
使用一块湿布按照从上到下、从左到右的环形路线顺序擦拭墙壁，注意清洁墙面的较高和较低处。
Use a damp cloth to wipe the walls in an annular route accordingly from top to bottom and from left to right, pay attention to clean higher and top parts of wall.
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