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单词	Nicholson's hydrometer
释义	Nicholson's hydrometer noun Nich·​ol·​son's hydrometer ˈnikəlsənz- : a hydrometer with a submerged pan for determining the specific gravities of solids by weighing them in water and in air Word History Etymology after William Nicholson †1815 English scientist
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英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。