The girls lined up behind the starting line, ready to dribble the ball to the cone at the other end of the court, and back again.
女孩子们在起跑线后站成一排，准备将篮球运到场地另一边的锥形标志，再运回来。
2
PROFILE: The true picture of a surface in relation to a horizontal line; a contour of a designated surface of a cup, cone, or roller.
型面轮廓：与水平线相比表面的实际轮廓线；实际设计的外圈，内圈或滚子的轮廓线。
3
The projection of the special points on the intersection line of cylinder with oblique cylinder , of cone with half sphere and of oblique cylinder with cone are determined with the analytic method.