chalks

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

那囚犯逃走了, 逃到伦敦去了.

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A white chalk chalks white on a black blackboard.

一根白色的粉笔在黑色的黑板上写白字.

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His steed was by chalks the best.

他的马是最好的.

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

简单的教学手段,如黑板 、 粉笔和录音机已经落后于时代.

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

我们研究了水对多孔白垩岩的力学性质影响.

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