Fresh fruit and vegetables form an essential part of a healthy diet. During the emergency, people stocked up on essential items like candles, medicines and tins of food.
1. 必要的,不可缺的 [(+to/for)] Hard work is essential to success. 成功必須努力工作。 2. 本質的,實質的;基本的 [B] There is no essential difference between the two drafts. 兩份草稿沒有本質上的不同。 3. 提煉的,精華的
They mean the same thing, but "essential" sounds stronger or more emotional. "It is necessary to make an appointment before your visit." "It is essential that we make enough money to stay in business." 1 讃
an essential component for all of these actions (stated explicitly in the last one) is the ability and the authority to make decisions. 所有這些行為中的必要部分(在最后一個中明確地陳述了)是制定決策的能力和權力。