評論
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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。
基本的;本質(zhì)的；根本的
Most authorities agree that play is an essential part of a child's development.
大多數(shù)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(huán)節(jié)。
2、average
平均數(shù)；均值
Take the average of those ratios and multiply by a hundred.
算出那些比率的平均值再乘以100
一般的;通常的;普通的
The average adult man burns 1,500 to 2,000 calories per day.
普通成年男子每天消耗的熱量為1,500到2,000卡路里。
Packaging is about a third of what is found in an average British dustbin.
英國垃圾桶里平均約有1/3是產(chǎn)品包裝。
正常數(shù)量;一般水平
Most areas suffered more rain than usual, with Northern Ireland getting double the average for the month.
大部分地區(qū)降雨超過通常水平，北愛爾蘭地區(qū)本月的降水量則為平均值的兩倍。
