chalk

柯林斯词典

1. N-UNCOUNT Chalk is a type of soft, white rock. You can use small pieces of it for writing or drawing with. 白垩
...white cliffs made of chalk. …白垩绝壁。
2. N-UNCOUNT Chalk is small sticks of chalk, or a substance similar to chalk, used for writing or drawing with. 粉笔[also N in pl]
...somebody writing with a piece of chalk. …正用粉笔写字的某人。
3. V-T If you chalk something, you draw or write it using a piece of chalk. 用粉笔画; 用粉笔写
He chalked the message on the blackboard. 他用粉笔把这条消息写在黑板上。