essential

Window locks are fairly cheap and absolutely essential..窗锁相当便宜，绝对有必要安装。

Even in small companies, computers are an essential tool..即使在小公司里，计算机也是不可或缺的工具。

The essential difference between Sam and me was the fact that I took life seriously..我和萨姆的根本区别在于我是认真对待生活的。

es ＋ sent(感觉) ＋ ial(…的) → 必要的感觉 → 必要的记忆

essential oil香精油，精油

essential condition必要条件

essential hypertension原发性高血压；特发性高血压

essential element必需元素

essential component主要部件；主要成分

essential difference本质区别

essential requirements基本要求；基本规范

essential amino acid必需氨基酸

essential nutrients基本营养物；必需营养素（essential nutrient的复数形式）

essential qualities固有性；本质（essential quality 的复数）

essential point本质点

essential information[计]基本信息

be essential for对…必不可少的

essential drugs基本药物

essential mineral知矿物；主成份矿物；基本矿物

essential fatty acid必需脂肪酸

essential parameter基本参数；本质参数

essential water组成水份

essential goods主要货物；必需品

真题例句...and essential work skill...CET42017.12阅读理解

真题例句...curiosity is essential to one's success...第二套CET42017.12阅读理解

真题例句...But crying as an expression of feeling is tmique to humans and has played an essential role in human evolution and the development of human cultures...第二套CET42014.6阅读理解

真题例句...Our ability to experience sympathy is essential to the development of civilization...第二套CET42014.6阅读理解

真题例句...tears have developed an essential role in social relationships...第二套CET42014.6阅读理解

真题例句...computer-aided design has become essential but in some ways has cheapened the design process...第三套CET42014.12阅读理解

真题例句...and yet strangely we worry when we see families investing so much in this supposedly essential good...第二套CET42013.12阅读理解

真题例句...It is essential that we act with integrity in order to build the kind of world in which we want to live...CET42011.12阅读理解

真题例句...Trust is essential in any important relationship...CET42011.12阅读理解

真题例句...It is essential to our well-being...CET42010.12阅读理解

真题例句...it is becoming essential to expand our under-standing of others and to reexamine some of our false assumptions...CET42009.6阅读理解