Four thousand troops have been reorganized into a fighting force.

4000人的军队已经被改编成了一支战斗力强的精锐部队。

《柯林斯英汉双解大词典》

They did not rise against America's invading force four years ago, as some feared they might.

由于一些人担心他们的力量（过于弱小），四年前他们没有起来抵抗美国人的入侵。

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Mr Nash says there is “a nice little race” to be among the first 30 countries whose ratification would bring the treaty into force (four did so immediately).

纳什说对于首先获准实施此项协议的30个国家而言，将会有“一个小比赛”。 其中的四个国家则立即付诸实施。

youdao

The United Nations peacekeeping force in south Lebanon has backed Israel's version of events following the most serious border clash in four years on Tuesday.

VOA: standard.2010.08.04

And so it really, not the course but the idea for the course, was an evolution three years four years ago, really, when I was involved in something called the Civic Values Task Force, which was started by Princeton Project 55.

所以说，不是这个课程,而是这个课程的设想，是在三四年前形成的，当时我参加了,公民价值专责小组，由普林斯顿大学55工程发起。

普林斯顿公开课 - 人性课程节选

He made a commitment to the nation's service members, in a refueling stop at Elmendorf Air Force Base on his way to visiting four nations in Asia.

VOA: standard.2009.11.13

But, with four Force India team members being close to a petrol bomb after leaving the track on Thursday, it's clear that the extra security is not enough.

CNN: Bahrain on the boil: Why can't F1 learn from its mistakes?

The police force four years ago had a crude 'simulator' in the form of a wooden maze which was barely transportable.

BBC: News | Education | Pupils become virtual crime fighters

Barcelona, meanwhile, must score four to even force extra time against a Bayern defensive juggernaut that has allowed just 14 on its way to the Bundesliga title.

WSJ: The Secret of Germany's Success