essentialadj.本质的;必要的;重要的n.要素;必需品
essential enzyme必需酶
essential reason本质原因
essential tremor家族遗传性震颤
essential anemia原发性贫血
essential ideals本质理想
essential matrix本质矩阵
essential rights基本权利
essential states本质状态
essential safety本质安全
essential factor基本因素