The endpoint is moved in the plane of the screen . its distance from the viewer does not change 末端作用线作用线只在屏幕平面移动,和观察者的距离是不变的
Except when the needle points in the n - s direction , the two forces do not have the same line of action 只要指南针不是指向n - s方向，这两个力就不在同一条作用线上。
Exaggerate the poses , push the lines of action in the body , and make the poses more dynamic and forceful 让姿势更夸张，使身体作用线更强，还要令姿势更有力量感和说服力。
Click on the shoulder and drag downwards towards the hand . this will create an action line . click and drag the end point to pose the arm 点击肩膀向手的下方拖动创建一条作用线.单击并拖动到终点构成的对手臂控制姿势的作用线
Based on the resolving algorithm of continuous - layer method , the time order analyzing curves , acceleration curves and the response spectra of transfer function at the different points of the ground and at the same point on the different ground conditions are gained . it demonstrates that the responses of ground in x , y and z axial directions all change by time , and the obvious wave propagation appears in ground . for different observing points on the same ground condition , at more distant points from the load line , the less swings are found , that is to say , vibration possesses the obvious characteristic of attenuation 基于分层法的解析算法，得到了在不同点以及在同一点但不同地质条件下的时程分析曲线、加速度变化曲线和传递函数反应谱，结果表明，地基土在x 、 y 、 z三个方向的响应都是随时间变化的，并且伴随有明显的波动现象产生；对于相同地质条件的不同观察点，距离荷载作用线越远的地方振幅越小，即振动具有明显的衰减性。
