actual test on lifetime 实际装机寿命试验
According to Herodotus, a historian writing within a lifetime of the actual battle this Phidippides guy did his running before the fight, not after it.
希罗多德是位历史学家，他穷尽毕生精力研究历史上真实的马拉松战役。 最后得出了惊人的发现：英雄斐迪庇第斯的著名事迹不是发生在马拉松战役之后，而是马拉松战役之前。
With the welding spot fatigue lifetime pre-estimation method, by combination of the finite element analysis and stress calculation, the welding spot fatigue damage under actual load can be calculated.
采用焊点疲劳寿命预估方法，通过有限元分析并结合应力计算，即可计算出实际载荷工况下的焊点疲劳损伤。
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