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(qū)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。

必需品;不可或缺之物

The flat contained the basic essentials for bachelor life.

那套公寓配有單身生活的基本必需品。

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。

2、priority

優(yōu)先事項；最重要的事；當務之急

Being a parent is her first priority.

做好母親是她的頭等大事。

The government's priority is to build more power plants.

政府的首要任務是建造更多的發(fā)電站。

優(yōu)先考慮；給…優(yōu)先權

The school will give priority to science, maths and modern languages.

學校將重點發(fā)展理科、數學和現代語言。

The proposals deserve support as they give priority to the needs of children.

這些提議值得擁護，因為它們優(yōu)先考慮了兒童的需求。

優(yōu)先于；比…重要

The fight against inflation took priority over measures to combat the deepening recession.

抵制通貨膨脹比抑制日益加劇的經濟衰退更為重要。

I disagree with the premise that economic development has priority over the environment.

我不贊成經濟發(fā)展應優(yōu)先于環(huán)境保護這個前提。