chalk 可數嗎

例句：

He chalked the message on the blackboard.

他用粉筆將消息寫在黑板上。

The two places, he insists, are as different as chalk and cheese.

他堅持説那兩個地方有天壤之別。

There was a blackboard with seven names chalked on it.

黑板上用粉筆寫着7個人名。

We shall chalk up his good points.

我們將記下他的優點。

The teacher wrote with a stick of chalk.

老師用粉筆寫字。