essential[英][ɪˈsenʃl][美][ɪˈsɛnʃəl]adj.必要的; 本质的; 基本的; 精华的; n.必需品; 基本要素; 必不可少的东西;例句：Education and health are also essential to the equation.教育和健康对这一问题来说也很重要。What essential piece of clothing would you take?你会带哪件必不可少的衣服呢？
essential 英[ɪˈsenʃl]美[ɪˈsenʃl]adj. 完全必要的; 必不可少的; 极其重要的; 本质的; 基本的; 根本的;n. 必不可少的东西; 必需品; 要点; 要素; 实质;[例句]It was absolutely essential to separate crops from the areas that animals used as pasture将庄稼和放牧区分开绝对必要。[其他] 复数：essentials
