复数： competitions

Competition is also a threat .

竞争也是一个威胁。

They also respond to competition .

他们同时也相互竞争。

So the competition is friendly ?

那么竞争是友好的？

But competition is hotting up .

但市场竞争很激烈。

Competition is stiff these days .

最近竞争越来越激烈。