英语词汇penetration index怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	penetration index
释义	penetration n — 穿透 n • 的渗 n • 贯孔 n index n — 索引 n • 指數 n • 下标 n • 指针 n
随便看	single chemical substances single chip camera single-chip device single chip microcomputer single-chip microcontroller single-chip solution single choice single-chucking single circuit single citizenship single-class single classification single class system single clause single clevis single click single-click access single client single client accounts single clock cycle single closing single clutch single cmo regulation single coated single coated tape

英汉双解词典包含2273206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。

penetration n —