然后，继续增加力-，受到重力的影响，不断给它悬挂重量-，然后它开始弯折，到这里的某一点，我们称之为弹性极限。

And then, when you keep adding force — which we will do by gravity, - we will just hang weights on it — then it starts to bend over, up to a point here which we call the elastic limit.

youdao

通过在光学元件边缘施加力矩，产生与重力相反的挠性变形，抵消重力变形的影响。

Torque is applied at the edge of the optical cell to generate flexible deformation offset the gravity deformation.

youdao