To choose the point elasticity or the arc elasticity?

选择点弹性还是弧弹性？

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First, we seek the origin of the elasticity and the invention of the point elasticity and the arc elasticity. We also search for their original paper respectively.

文中首先寻找弹性的由来始末，以及点弹性和弧弹性的产生过程，并各自找出它们的原始文献。

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Determination of the bending strength of gear teeth of circular-arc profile gear is very difficult due to many unknown factors, which would be also a complicated problem in the field of elasticity.

确定圆弧形齿轮轮齿强度将涉及到很多因素。就是在弹性理论上来看也是一个复杂的课题。

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