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Some mistaken viewpoints were clarified , and requirements on covariability of conservation law were studied deeply.
从一道力学试题出发,讨论了机械能守恒的条件, 并深入研究了守恒规律的协变性要求.
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英汉双解词典包含4367426条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。