然而，尽管眼疲劳可能会引起一些部位的疼痛或头痛，但它不会永久性地损害视力。

However, although eyestrain may cause some pain or headaches, it does not permanently damage eyesight.

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疲劳是一个无可避免的老化的过程，但是像开口和接头这样的薄弱的部位可以使用胶粘剂粘合来代替铆钉和螺栓，并且用大的板材来铸造机翼。

Fatigue is an aging process that cannot be avoided, but weak points such as holes and joins can be reduced by using adhesives instead of rivets and bolts, and by casting wing skins in gigantic panels.

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断裂面从轴承部位外部开始延伸到整个截面。典型的是从圆弧部开始，常常会由于疲劳而产生的裂纹的扩展后引起的。

Fracture lines start from the outside and spread over the whole cross section, particularly starting in the fillet area and very often after a fatigue crack propagation.

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