求翻译这段土木工程专业英语,急
Toillustratewithreferencetothebeamjustdescribed,iftheshort-timepeakloadhadbeenappliedearlyinthelifeofthemember,beforetime-dependeddeformationsoccured.thesustained-loaddeflection.&susofstep3shouldbecaculatedusingⅠebasedonthetotalload-momentdingram(sustainedpluspeakload)becausethecrackingwhichwouldresultformthatloadwouldpermanentlyreducethestiffnessofthemember.