slipstick

例句：

1. 1.He used a slipstick to write the name on the board.
   他用粉笔在黑板上写了名字。
2. 2. The teacher gave us a slipstick as a reward for good behavior.
   老师给了我们一支粉笔作为表现良好奖励。
3. 3. She carefully wiped off the chalk from her pencil before she started writing.
   她在开始写字前仔细擦掉了铅笔上的粉笔。