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ppb (part per billion)
ppb (part per billion)
英
[ppb (part per billion)]
美
[ppb (part per billion)]
中文释义
十亿分之一 (10-9)
单词分析
单词结构:
ppb (part per billion)
字母数:22
记忆提示
🎯 重点记忆:
单词拼写:ppb (part per billion)
核心含义:十亿分之一 (10-9)
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更新时间:2026-02-03 18:29:49