essential elements

US 
UK 
  • na.要素
  • Web必需元素;基本要素;必要元素
na.
1.
要素

Sample Sentence

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