Put it on a wet sponge to clean crayon off a chalk board.

湿海绵上放些小苏打可以擦掉黑板上的粉笔画。

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All that was left of the New York skyline was a chalk cloud.

纽约的地平线上只剩下了一团白云。

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"Sure," said the second, "I put a chalk mark on the side of the boat."

“当然。”第二个说：“我用粉笔在船的边上划了记号了。”

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Bourbon House displays the numbered area on a chalk board behind the oyster bar for their customers to see.

VOA: standard.2010.05.08

Clearly, if I take a chalk like this one here, and I throw it on the ground, and it breaks in little pieces, if I run the movie backwards that doesn't make sense, right?

很清楚，如果我拿一支这样的粉笔，把它扔到地上，它会摔成碎片，如果我们把这个场景倒过来放映,那是没有意义的，对吧？

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But suppose you are in a train and you're moving past me and you look at this piece of chalk.

但假如你在火车上,从我面前驶过,你看着这支粉笔

耶鲁公开课 - 基础物理课程节选

"Stoke Park is a chalk-based site so the water tends to run off, " said spokesman Ade Goldsmith.

BBC: Olly Murs

The noise blasts were a mixture of several sounds that most people hate, like fingernails on a chalk board, dentist drills, and sirens.

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The soil consists of a chalk subsoil, topped by a covering of rubble that is made up of sand, lignite, marl, loam and clay.

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