一个熟练的保洁员只需一桶热肥皂水和一把橡皮刷就能把窗户打扫得干干净净。

EXAMPLE: A skillful janitor can clean windows perfectly with just a bucket of hot soapy water and a squeegee.

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重新开始一遍，将橡皮清洁刷的顶部与先前的2寸条状对准。

Begin again, with the top of the squeegee overlapping the previous stroke about 2 in.

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然后，选择橡皮工具，用300px的柔性笔刷擦除。

Then, Erase the bottom part using a 300px soft brush.

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