The simple fact that I had to strain to actually see the creases was proof enough for me.
这个简单的事实，我不得不应变，以实际看到的折痕的证据足以证明对我来说。
Finally, optical fiber lifetime is estimated and the lifetime design picture of optical fiber which passed three-grades proof testing strain is given.
最后，对筛选试验后的光纤寿命进行了估算，给出了光纤经三个等级的筛选应变后的寿命设计图。
This paper deals with how to determine sturctural strain modes theoretically, and the proof for the monotony of the first order strain mode of a cantilever beam has been given.
给出了悬臂梁应变模态的解析解 ，并在此基础上证明了其一阶应变模态的单调性 。
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