1、essential

絕對必要的;必不可少的;基本的

It was absolutely essential to separate crops from the areas that animals used as pasture.

將莊稼和放牧區分開絕對必要。

As they must also sprint over short distances, speed is essential.

由于他們也必須進行短跑，因此速度至關重要。

基本的;本質的；根本的

Most authorities agree that play is an essential part of a child's development.

大多數權威人士都同意，玩耍在孩子成長過程中起著非常重要的作用。

In this trial two essential elements must be proven: motive and opportunity.

在這次審訊中，必須證明兩個基本因素：動機和時機。

（某學科的）基礎，基本知識

the essentials of everyday life, such as eating and exercise.

飲食、鍛煉等日常生活的要素

This has stripped the contest down to its essentials.

這就使比賽精簡到最基本的環節。

2、control

(對機構、地方、體系等的)控制權，支配權

The restructuring involves Mr Ronson giving up control of the company.

這次改組涉及龍森先生放棄對公司的控制權。

The first aim of his government would be to establish control over the republic's territory.

他這屆政府的首要目標是確立對共和國領土的控制權。

控制(能力);支配(能力)

He lost control of his car.

他的汽車失控了。

Some teachers have more control over pupils than their parents have.

有的老師比小學生的父母更能管得住他們。

控制;掌管;管理;統治

He now controls the largest retail development empire in southern California.

他現在掌管著加州南部最大的零售發展企業。

Almost all of the countries in Latin America were controlled by dictators.

當時幾乎所有的拉丁美洲國家都由獨裁者統治。