2006年，巴西艺术家亚历山大·奥利翁将圣保罗的一条交通隧道的尘土清理干净，将其变成一幅令人惊叹的壁画。
Brazilian artist, Alexandre Orion, turned one of Sao Paulo's transport tunnels into an amazing wall painting in 2006 by getting rid of the dirt.
举个例子，如果空气中有一些火山爆发时产生的灰尘，月亮表面会变成暗棕色，但如果大气是干净的，它将变成明亮的血红色。
If there is a lot of dust from a volcanic eruption, for example, the lunar surface may turn a dark brown, but if the atmosphere is clear, it may turn a striking blood red.
他们以餐桌服务和干净整洁的铺面来把肯德基快餐厅变成是很酷的地方。
And they make these cool hip places with table service and clean gleaming stores.
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