To create frottage art, we must touch the object we want to rub over…

和以往拍照不同，拓绘，是要去碰触拓绘的物品…

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Once they find the name, many rub a pencil on paper over the letters to copy it.

VOA: special.2009.05.25

Dip them into water -- keep a bucket of water near you -- shake off the excess water and rub that over the upholstery, and the hair will collect on the rubber gloves.

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You break an internal vial and then rub the swab over the object for thirty seconds.

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Sear meats quickly over high heat so the rub or spices adhere, then cook over a low temperature.

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