Their military capability has gone down because their air force has proved not to be an effective force.

他们的军事力量已经削弱了，因为其空军被证明不是一只有战斗力的队伍。

《柯林斯英汉双解大词典》

The study shows that punishment is not an effective force for promoting cooperation.

研究显示惩罚不是有效的促进合作的力量。

youdao

Thanks partly to foreign aid, prosecutors are backed by a fairly effective force of detectives and a witness-protection programme.

一定程度上也要感谢外国援助，举报人受到侦探力量的相当有效的支持并且受到目击者保护项目的保护。

youdao

Many months would pass before the Union could build up an effective naval force.

VOA: special.2009.09.10

He says in the short term, the most effective way to combat piracy is with military force.

VOA: standard.2009.10.30

The general said that attitude among most alliance members makes it impossible for NATO's International Assistance Force in Afghanistan to pursue an effective counterinsurgency campaign, involving clearing areas of hostile fighters, and holding those areas so economic development and governance projects can proceed.

VOA: standard.2009.03.24

Plan Colombia has helped to equip the security forces and transform them into a more effective force within the country.

CENTERFORSECURITYPOLICY: Columbia: Moving toward more stability

Indeed, an effective force could work itself out of a job, thus undermining the logic of its government contributing it in the first place.

BBC: What You've Said

For all its sudden enthusiasm, the Iraqi opposition has a long way to go before any of its parts, or even the whole, becomes an effective force.

ECONOMIST: New optimism among the groups who oppose Saddam Hussein