chalks

The prisoner has walked his chalks , and is off to London.

那囚犯逃走了, 逃到倫敦去了.

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A white chalk chalks white on a black blackboard.

一根白色的粉筆在黑色的黑板上寫白字.

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His steed was by chalks the best.

他的馬是最好的.

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Simple teaching tools such as the blackboard, chalks and tape recorders have fallen behind the times.

簡單的教學手段,如黑板 、 粉筆和錄音機已經落后于時代.

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Influences of water interaction on the mechanical behaviour of porous chalks have been studied.

我們研究了水對多孔白堊巖的力學性質影響.

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