They talk about detente, but in actuality they are engaged in intense rivalry.

他们嘴里讲缓和，骨子里却进行激烈的争夺。

《新英汉大辞典》

Despite the intense rivalry between the two London clubs, Chelsea would be willing to sell Gudjohnsen to the Gunners if they meet their valuation.

尽管两家伦敦俱乐部有着强烈的竞争，但如果两家商议的开心，切尔西还是愿意把古德扬森卖给阿森纳的。

youdao

Threat of intense segment rivalry: a segment is unattractive if it already contains number of strong or aggressive competitors.

区间内激烈竞争的威胁：如果区间内已存在几个强大的、有攻击性的竞争者，它就不怎么好。

youdao

Strachan and McLeish still remain friends, despite the intense rivalry between the two Glasgow clubs.

BBC: SPORT | Football | My Club | Celtic | McLeish treble 'best' - Strachan

This now-intense rivalry could even end up moving New Delhi in the right direction.

FORBES: India's Accidental Economic Formula

There is intense rivalry among airlines for landing and take-off slots at the busiest European airports.

BBC: EU Commission: Airport slots need improvement