adding appropriate amount
adding appropriate amount
加入适量
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Fracture analysis by the scanning electron microscope shows that grain growth can be effectively inhibited and product properties highly improved by adding appropriate amount of foreign elements.
扫描电镜断口分析表明：掺杂可以控制晶粒生长，提高材料的性能。
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