adj.本質(zhì)的；必要的；重要的

n.要素；必需品

This is of course still the essential method. 這當(dāng)然仍是本質(zhì)的方法。

This is desirable but by no means essential to the primary objective of validating mathematical models of aircraft behaviour. 對(duì)于驗(yàn)證飛機(jī)性能的數(shù)學(xué)模型這一主要目的來(lái)說(shuō)，這是必須的，但決不是最本質(zhì)的.

Concentration is essential if you want to do a good job. 如果你想把事情做好,專心是必要的。

What are the essentials of good teaching? 成功教學(xué)的要素是什么?

The first essential, of course, is to know what you want. 第一要素當(dāng)然是知道自己想要什么。

We only had time to pack a few essentials. 我們只來(lái)得及裝上幾件必需品。

A man should never neglect these social essentials. 一個(gè)人決不該疏忽了這些社交上的必需品。

essential用作形容詞指事物賴以存在或與他物相區(qū)別的“最基本的”東西。一般與to或for連用,表示“對(duì)…是要緊的”。

essential用于“It is/was essential+that-clause”結(jié)構(gòu)時(shí), that從句要用虛擬語(yǔ)氣。

adv.本質(zhì)上；本來(lái)

adj.非必要的；無(wú)關(guān)緊要的

n.無(wú)關(guān)緊要的東西

n.要件；概要

adj.精粹的；精髓的；典型的

adj.非本質(zhì)的；非必需的

n.不重要的人或物

adj.精粹的；精髓的；典型的