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troy weight, system of weights for precious metals and gemstones based on the 12-ounce pound (or 5,760 grains)
江苏热线英汉汉英双解词典包含207361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。