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ppb (parts per billion)
ppb (parts per billion)
英
[ppb (parts per billion)]
美
[ppb (parts per billion)]
中文释义
亿分率(≈微克/升)
单词分析
单词结构:
ppb (parts per billion)
字母数:23
记忆提示
🎯 重点记忆:
单词拼写:ppb (parts per billion)
核心含义:亿分率(≈微克/升)
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更新时间:2026-04-14 20:01:06