粉笔 chalk 彩色粉笔 coloured chalk; 用红粉笔写 write in red chalk; 一支粉笔 a piece [stick] of chalk; 用粉笔在黑板上写下来 chalk down on the blackboard; 他用粉笔在黑板上勾划出一个图样。 he chalked out a design on the blackboard.; 粉笔槽 a ledge for chalk on a blackboard; 粉笔画 chalk drawing; crayon