chalk的基本意思是指“制造白色或彩色粉笔的白垩”，表示一种物质，是不可数名词。作“粉笔”讲时，一般用作不可数名词，但说“各种颜色的粉笔”时，则要用复数。表示“一支粉笔”时用a piece of chalk，“两支粉笔”用two pieces of chalk.
扩展资料
例句：
He chalked the message on the blackboard.
他用粉笔将消息写在黑板上。
The two places, he insists, are as different as chalk and cheese.
他坚持说那两个地方有天壤之别。
There was a blackboard with seven names chalked on it.
黑板上用粉笔写着7个人名。
We shall chalk up his good points.
我们将记下他的优点。
The teacher wrote with a stick of chalk.
老师用粉笔写字。
