competition 是名詞，表示比賽;競賽時是可數名詞,還可以解釋為競爭者;對手。
當它作競爭角逐的時候是抽象名詞,就是不可數名詞,如：He was in competition with 10 othersfor the job.
這時competition就是不可數名詞。
competition英語例句：
1. Malvolio becomes, in default of competition, the play's moral centre.
因為沒有與其競爭者，馬伏裏奧自然成了該劇的道德核心。
2. 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。
3. Moreau took gold in the five-kilometre individual pursuit competition.
莫羅在個人五公裏追逐賽中獲得金牌。
4. The movie industry had chosen to ignore the encroaching competition of television.
電影業故意無視電視業的侵犯性競爭。
5. That would make the competition between rival suppliers even deadlier.
那將使得對立供應商之間的競爭更加妳死我活。