competitor可數嗎

雙語例句：

The very notion of price competition is foreign to many schools.

價格競爭這個概念對於許多學校都很陌生。

There's been some fierce competition for the title.

奪冠之爭一直都相當激烈。

I have to change my approach, the competition is too good now.

我得改變方法，現在的競爭對手太強。