He sketched the contours of a building with a charcoal pencil.

他用炭笔在纸上勾勒出了一个建筑物的轮廓。

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For the first 20 years of his active career, Redon worked almost entirely in black, using charcoal and grease pencil and eventually producing lithographs of images as dark as their media.

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Sandy had several large portraits of the heroic aviator, in both pencil and charcoal, stowed away in his portfolio.

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First, acquire some sort of marking device: pen, pencil, charcoal or gouging stick.

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