名词
中文翻译：灰色板
同义词：
['greyboard', 'greywood']
例句：
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1. The engineer used a greyboard to draw the design.
工程师用一块灰色板来绘制设计图。
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2. The oldhouse had a grey board on the wall.
那所老房子的墙上挂着一块灰色板。
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3. The artist used a grey boardto create his masterpiece.
艺术家用一块灰色板创作了他的杰作。