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essential
副词: essentially 名词: essentiality
adj.本质的;必要的;重要的
n.要素;必需品
用作形容词 (adj.)
This is of course still the essential method.
这当然仍是本质的方法。
This is desirable but by no means essential to the primary objective of validating mathematical models of aircraft behaviour.
对于验证飞机性能的数学模型这一主要目的来说,这是必须的,但决不是最本质的.
用作名词 (n.)
What are the essentials of good teaching?
成功教学的要素是什么?
The first essential, of course, is to know what you want.
第一要素当然是知道自己想要什么。
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