essential

• Phosphorus is essential to plant growth .
  植物生长需要磷。
• He had one of his most essential letters to write .
  他还有一封十分紧急的信要写。
• Her character is, in fact, finished in its essentials .
  她的性格事实上基本定型。
• It does not hurt the important essentials .
  无伤大体。
• It is essential first to get rid of preconceived notions .
  必须首先根除那些先入之见。
• This wealth was essential to the support of learning .
  这种财富对于学术活动是不可少的。
• Language is an essential ingredient of abstract thought .
  语言是抽象思维的主要成分之一。
• This was all the essential information margaret needed .
  这是玛格丽特想知道的实质性情况。
• The essential facet of this process is a two-unit assembly .
  此过程的要点是两部分的组合。
• A man should never neglect these social essentials .
  一个人决不该疏忽了这些社交上的必需品。