英语词汇“quaternary activity”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	quaternary activity
释义	quaternary activity 第四级产业活动
随便看	weak soil weak soil foundation weak soil ground weak soil layer weaksolution weak solution weak solution of iodine weak solution of SDE Weak solutions weak solution space weak sore weak sores weak soup weak source Weak source reactor weak spark weak spiral accelerator weak-spiral accelerator weak spiral cyclotron weak spiral geometry weak-spirited weak sports group weak sports item weak spot weak spots