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。
2
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。
3
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.