In this paper, a computer matching technique for steel grades comparison between different nations (named as DMS) is put forward.

提出了一种多国材料牌号自动匹配技术(DMS)。

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The theoretically calculated values have shown satisfactory agreement in comparison with the measured data from almost two hundred steel grades in both domestic and foreign standards.

理论计算值与国内外标准中将近二百个钢号的实际数据相对照，显示了令人满意的一致性。

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The comparison among different grades showed some knowledge and actions were not good enough in higher grades, especially in middle school students.

不同年级比较发现，某些认知和行为随年龄增长反而变差，尤以中学生为甚。

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