slate pencil

• 一种用软质板岩（石板）制成的小细条，用于在石板（石板黑板）上写字；在纸张普及之前曾在学校中广泛使用，现已过时，现代语境中很少使用。

A thin piece of soft stone (slate) used for writing on a slate board, historically common in schools before paper became widely available. The phrase is now archaic and rarely used in modern contexts.

1. Writing tool for slateB2formal

   A small, thin stick of soft stone or soapstone used for writing on a slate board, historically common in schools.

   石板笔

   • Children in the 19th century used a slate pencil to practice their letters.
   • The teacher handed out slate pencils and small boards to the students.
   • He carefully sharpened his slate pencil on the stone windowsill.