chalk

1. N-UNCOUNT Chalk is a type of soft, white rock. You can use small pieces of it for writing or drawing with. 白堊

...white cliffs made of chalk. …白堊絕壁。

2. N-UNCOUNT Chalk is small sticks of chalk, or a substance similar to chalk, used for writing or drawing with. 粉筆[also N in pl]

...somebody writing with a piece of chalk. …正用粉筆寫字的某人。

3. V-T If you chalk something, you draw or write it using a piece of chalk. 用粉筆畫; 用粉筆寫

He chalked the message on the blackboard. 他用粉筆把這條消息寫在黑板上。