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The reduction of strength of a material caused by the presence of a notch or other stress raiser; the degree of this.
1930s; earliest use found in Journal Research National Bureau of Standards (United States).
礼仪网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。