The main donor countries have been in "aid fatigue", while the impact of ODA on growth varies in receiving countries.

二十世纪九十年代以来，ODA总量出现长期的停滞不前，主要援助国陷入了“援助疲劳”；

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With the aid of a computer, a method used to simulate the fatigue stress spectra of railway Bridges by loading the influence lines with the train marshalling list is presented in this paper.

本文提出了借助于电子计算机，用列车编组单对影响线加载来模拟铁路桥梁疲劳应力谱的方法。

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This paper discusses wear life of laser cladding samples with the aid of the theory of contact fatigue wear.

利用接触疲劳磨损理论讨论激光熔覆试样的疲劳磨损寿命问题。

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