名词
中文翻译：粉笔
同义词：
['white chalk', 'eraser例句：1. The teacher uses black chalk to write on the blackboard.（老师用粉笔在黑板上写字。）']
例句：
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1. The teacher uses black chalk to write on the blackboard.
老师用粉笔在黑板上写字。
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2.After class, students use black chalk to clean the blackboard.
课后，学生们用粉笔擦黑板。
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3.The black chalk marks are difficult to see in the dark room.
在黑暗的房间中，粉笔的痕迹很难看清。