必需的英文：
essential

参考例句：
  • Food, clothing and shelter are needful for the maintenance of health.
    衣、食、住是维持健康所必需的。
  • Whatever method of heating was used, artificial respiration was essential for reanimation.
    无论用任何暖和方法,人工呼吸仍是救生所必需的。
  • Whatever method of heating was used,artificial respiration was essential for reanimation.
    无论用任何暖和方法，人工呼吸仍是救生所必需的。
  • A vital or animating force; lifeblood.
    维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
    后面将会看到，胶子对于质子内夸克的动力学机制来说是必需的。
  • The monitor is an essential output device of a microcomputer.
    显示器是微机必需的输出设备。
  • Air is indispensable to life.
    空气是生命所必需的。
  • You must lie down and rest.
    你必需躺着休息。
  • Their need was fresh water.
    他们所必需的是淡水。
  • Water is essential for plants.
    水对于植物是必需的。
essential是什么意思：
a.
1.必要的，必不可少的
2.本质的，基本的
3.提炼的，精华的
n.
1.要素，要点
2.本质，实质
  • They are essentially in a triunity.
    他们本质上是三位一体的。
  • Protein is essential to life.
    蛋白质是生命必不可少的。
  • Coal is an essentially nonrenewable resource.
    煤是不可再生资源。
  • There is distinction of the basic essentials and the periphery
    事有本末
  • Toughness is its essential feature.
    韧性是其必备特征。

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