m essential信息详情
m基本要求
essential───n.本质；要素；要点；必需品；adj.基本的；必要的；本质的；精华的
essential service───基本服务；必要服务
essential skills───基本功
essential workers───基本工人
essential skill───基本功
cajeput essential───卡杰普特精华
m m m───m m m m
essential tool───必备工具
fum essential───基本烟雾
Studies on the biology and ecology of M. alternatus are essential for the control of M. alternatus and the epidemic and spread of B. xylophilus.───对重庆地区松褐天牛生物学、生态学的深入研究，对有效控制松褐天牛的发生危害和松材线虫病的传播蔓延具有重要的指导意义。
Zhang X. M. , C. H. Shi, J. G. Wu, G. L. Bao, S. H. Ye, T. Katsura, The relationship between essential amino acid contents of hybridized combinations and their parents.───张小明、石春海、吴建国、鲍根良、叶胜海和富田桂，杂交稻米必需氨基酸含量与亲本的关系。
A ring Re, (M) iff each nonzero homomorphic image of R either contains a nonzero M-ideal or has an essential ideal.───一个环R∈（M）当且仅当R的每一个非零同态象或者包含一个非零M理想或者有本质理想。