求翻译：如果靴子上有油污，用剃刀或者锋利的刀在白粉笔上刮下一些粉末，覆盖在污渍上，然后吹去粉末，轻轻地用手擦污渍。重复几次，直到污渍基本消失。对于极其顽固的污渍，你可以用砂纸擦，但是这样会让颜色变浅。是什么意思？

If there is oil on the boots, with a razor or sharp knife scraped some of the white chalk powder, cover the stain, then blow it away powder and gently rub the stain. Repeat several times until the stains disappeared. For very stubborn stains, you can rub with sandpaper, but this will make the color

If an oil slick on his boots, and razor blade or sharp knife on the white powder was scraped some powder to cover the stains, and then blow them away, powder, gently wiped stains. repeated several times, until stains basically disappeared. For extremely stubborn stains, you can use sandpaper shoe sh

If on the boots has the greasy dirt, blows some powder with the shaving cutter or the sharp knife on the white chalk, covers on the dirt, however the after goes to the powder, gently scratches the dirt with the hand.Duplicates several times, until dirt basic vanishing.Regarding the extremely stubbor

If the boots on oil, with a razor or sharp knife scraping some powder on the white chalk, covered on the dirt, and then blow away the powder, gently wipe dirt with his hand. Repeat several times, until the stains disappear. For stubborn stains, you can sand, but this will make the color lighter.

If on the boots has the greasy dirt, blows some powder with the shaving cutter or the sharp knife on the white chalk, covers on the dirt, however the after goes to the powder, gently scratches the dirt with the hand.Duplicates several times, until dirt basic vanishing.Regarding the extremely stubbor