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Selenium and aluminum are found in vanishingly small concentrations within living things.
硒和铝在生物中含量其微.
辞典例句
"errors are vanishingly rare"
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。