| 释义 |
parallelogram/pærəˈleləɡræm/n. a four-sided plane rectilinear figure with opposite sides parallel 平行四边形 □ parallelogram of forces 1 a parallelogram illustrating the theorem that if two forces acting at a point are represented in magnitude and direction by two sides of a parallelogram meeting at that point, their resultant is represented by the diagonal drawn from that point 力的平行四边形 2 this theorem 力的平行四边形定理 [French parallélogramme via Late Latin parallelogrammum from Greek parallēlogrammon (as PARALLEL, grammē ‘line’)] |