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essential to

US 
UK 
  • adj.对…是必需
  • Web对…必不可少;必不可少的;重要的
adj.
1.
对...是必需
un.
1.
对...必要

Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard
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