correction可数吗?

可数。correction矫正。
释义：
n、校正;修正;改正;纠正;改正的行动(或过程);惩罚;处罚;惩治。
int、(想纠正刚说过的话时用)改正，更正。
例句：The paper had to publish a correction to the story、 这家报纸不得不对这则新闻报道发一个更正。

例句：

There are some programming errors that need correction、

有一些程序错误需要改正。

The correction had already been set in type、

那处修正已经出现在铅字纸上。

Once the plaster was dry there was no room for correction

一旦灰泥一干，就没有机会修改了。

Anything inappropriate in the text, awaits correction by the knowledgeable、

文中不当之处，有待识者教正。