一、essential 形容词 a. 1.必要的,不可缺的[(+to/for)]Hard work is essential to success. 成功必须努力工作。 2.本质的,实质的;基本的[B]There is no essential difference between the two drafts. 两份草稿没有本质上的不同。 3.提炼的,精华的名词 n. [P]1.要素,要点;必需品Our course deals with the essentials of management. 我们的课程讲述管理的基本要点。 2.本质,实质二、recommend1..推荐,介绍[(+as/for)][O1]2.建议,劝告[O2][+v-ing][+that]3.使成为可取,使受欢迎[(+to)]His proposal has much to recommend it. 4.付托,托付[(+to)]I recommended my child to her care.