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known substance
known substance
英
[known substance]
美
[known substance]
中文释义
已知物;已知物质
单词分析
单词结构:
known substance
字母数:15
记忆提示
🎯 重点记忆:
单词拼写:known substance
核心含义:已知物;已知物质
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更新时间:2026-02-06 11:21:28