In the paper, We present the recent theory and experiments of the fifth force.

本文介绍了近年来关于第五种力的理论及实验情况。

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Is there the intermediate-range composition-dependent force (usually called the fifth force)? Is there also other basic interaction? This is one of the fundamental problems in physics.

是否存在一种与物质成份相关的中程力（通常称为第五种力）?还有其它相互作用力存在吗?这是人们一直追寻的基础研究课题之一。

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Aircraft were so precious that the incident brought on a confrontation between General George Kenny, commanding officer of the Fifth Air Force, and the volatile Whitehead.

飞机如此宝贵，第五航空队司令乔治·肯尼为此和暴躁的怀特黑德发生了激烈的争执。

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Then,on April twenty-fifth, General Taylor received word that a large Mexican force had crossed the border a few kilometers up the river.

VOA: special.2009.02.26

The fifth and final force is that Math is trumping Science.

FORBES: Five Forces Shaping the Future

This makes sense, especially since hopes of resurrecting the SPD-Green coalition have diminished now that the ex-communist Left party is established as a fifth force in the Bundestag.

ECONOMIST: Germany��s Green party is flourishing

Immigrants make up nearly one-fifth of the work force, mainly in agricultural and unskilled jobs.

FORBES: Greece