improver

US 
UK 
  • n.改进者;改进物;学徒
  • Web改善物;粘度指数增加剂;初中级
n.
1.
改良者,改进者;改进物
2.
见习生,学徒

Sample Sentence

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