unreturnable
不能返回的
例句
For collinear collision, the preceding collision velocity and post collision velocity are calculated on the basis of the slippage distance and unreturnable distortion of collision vehicle;
对于一维碰撞,根据碰撞后车辆的滑移距离和车辆的塑性变形量,反推计算出车辆碰撞后的速度和碰撞前的接触速度;