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Test methods are weighing method and conductivity method, two method has its advantages and disadvantages.
查验办法有称轻法和导电率法, 两栽办法各有其优缺不面.
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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。