塑性变形就是在断裂前弯曲或变形的能力。

Plastic deformation is the ability of bend or deform before breaking.

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另外，它还能帮助我恢复在电脑前弯曲了一天的腰。

Plus, it helps my back recover from a day spent bent in front of a computer screen.

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同时，钢轨的矫前弯曲度还影响矫直力的大小，进而影响矫直机的寿命。

Simultaneously, the curvature before straightening also affects the size of force on straightening, and it also affects the life span of straightening machine deeply.

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