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。
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。
First he announced plans to sack a fifth of the firm's sales force.
首先,他宣布了裁员计划,要裁去公司五分之一的销售人员。