1)bee-line,n.(两地之间的)直线;最短距离2)the shortest line,最短距离线3)L.B.P.,垂直线间的距离4)b.c.,两中心之间的距离5)a stone's throw ; a slingshot,一箭之地;很短的距离6)bee line,空中距离，最短距离，捷径，直线
用法和例句
Based on the theory of the shortest lines,the drumlike cutter was dispersed along the latitude direction convenient for the cutter location and pasture regulation.