“偏心率”常见的英文表达是 eccentricity 。在物理学、天文学、工程学等多个领域中，这个词都用来描述轨道、曲线等偏离标准圆形（或正圆）的程度。例如：
The eccentricity of an orbit is a measure of how much it deviates from being a perfect circle.（轨道的偏心率是衡量其偏离完美圆形程度的指标。）
In engineering, the eccentricity of a load refers to the offset between the line of action of the load and the centroid of the cross - section.（在工程学中，荷载的偏心率指的是荷载作用线与截面形心之间的偏移量。）