Competition between companies is too fierce for self-regulation to work.

公司之间的竞争过于激烈，难以进行自我调节。

《柯林斯英汉双解大词典》

There's been some fierce competition for the title.

已有一些为此头衔的激烈竞争。

《柯林斯英汉双解大词典》

Consumers have a wide array of choices and price competition is fierce.

消费者的选择面很广，价格竞争也很激烈。

《柯林斯英汉双解大词典》

Competition to work at a top hospital can be fierce.

VOA: special.2009.06.02

The competition is fierce. Leaders from Spain,Japan and Brazil are all expected to go to Copenhagen to make one last appeal to the IOC.

VOA: standard.2009.09.16

Growth is slow, competition fierce, margins narrow even during good times.

FORBES: Staples, OfficeMax Or Office Depot, Which Is The Better Buy?

But, as anyone on the "field-end" rather than the "fork-end" of the food supply chain will tell you, these days margins are tight and competition fierce.

BBC: NEWS | UK | The plight of the UK countryside

And in NYC, where competition is fierce, carriers are in a bit of a price war.

WSJ: At Least the Price Is Right