英语词汇productive strata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	productive strata
释义	productive strata productivenessn. 生产率；多产 counterproductiveadj. 反生产的,使达不到预期目标的 superconductivityn. 超导性(超传导性)
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