必需的英文：
essential

參考例句：
  • Food, clothing and shelter are needful for the maintenance of health.
    衣、食、住是維持健康所必需的。
  • Whatever method of heating was used, artificial respiration was essential for reanimation.
    無論用任何暖和方法,人工呼吸仍是救生所必需的。
  • Whatever method of heating was used,artificial respiration was essential for reanimation.
    無論用任何暖和方法，人工呼吸仍是救生所必需的。
  • A vital or animating force; lifeblood.
    維持生命所必需的力量、活力、生命液。
  • We shall see later that gluons are essential to the dynamics of the quarks inside the proton
    后面將會(huì)看到，膠子對(duì)于質(zhì)子內(nèi)夸克的動(dòng)力學(xué)機(jī)制來說是必需的。
  • The monitor is an essential output device of a microcomputer.
    顯示器是微機(jī)必需的輸出設(shè)備。
  • Air is indispensable to life.
    空氣是生命所必需的。
  • You must lie down and rest.
    你必需躺著休息。
  • Their need was fresh water.
    他們所必需的是淡水。
  • Water is essential for plants.
    水對(duì)于植物是必需的。
essential是什么意思：
a.
1.必要的，必不可少的
2.本質(zhì)的，基本的
3.提煉的，精華的
n.
1.要素，要點(diǎn)
2.本質(zhì)，實(shí)質(zhì)
  • They are essentially in a triunity.
    他們本質(zhì)上是三位一體的。
  • Protein is essential to life.
    蛋白質(zhì)是生命必不可少的。
  • Coal is an essentially nonrenewable resource.
    煤是不可再生資源。
  • There is distinction of the basic essentials and the periphery
    事有本末
  • Toughness is its essential feature.
    韌性是其必備特征。

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