疲劳失效 (Failure by Fatigue)： Fatigue)： 由于交变应力的作用，初始裂纹不断扩展而引 由于交变应力的作用，初始裂纹不断扩展而引 起的脆性断裂。
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The dynamic effects due to vibration should be taken into account by the designer if fatigue failure is to be avoided.
为了避免弹簧的疲劳破坏，设计者应对弹簧由振动所引起的动力影响加以考虑。
Thermal fatigue. A type of fatigue failure wherein the cyclic stresses are introduced by fluctuating thermal stresses.
一种疲劳失效类型，循环应力是由于交变热应力引起的。
The patients who qualified were debilitated by the disease, which causes shortness of breath, fatigue and congestive heart failure.
适合的患者是很虚弱的，因这种病导致导致呼吸困难、劳累和充血性心力衰竭。
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