parts per trillion (
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parts per trillion (ppt)
英
[parts per trillion (ppt)]
美
[parts per trillion (ppt)]
中文释义
一万亿分之几, 兆分率
单词分析
单词结构:
parts per trillion (ppt)
字母数:24
记忆提示
🎯 重点记忆:
- 单词拼写:parts per trillion (ppt)
- 核心含义:一万亿分之几, 兆分率
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更新时间:2026-09-26 01:49:36