名词
中文翻译：粉笔
同义词：
['chalk', 'chalkboard chalk例句：1. He used the ground chalk to draw a picture on the blackboard.（他用粉笔在黑板上画了一幅画。）']
例句：
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1. He used the ground chalk to draw a picture on the blackboard.
他用粉笔在黑板上画了一幅画。
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2.The teacher asked the students to use ground chalk to write their names on the whiteboard.
老师要求学生们用粉笔在白板上写下他们的名字。
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3. The student carefully ground the chalk into small pieces before using it on the blackboard.
学生在用粉笔之前小心地把粉笔磨成小块。