on the ball

US 
UK 
  • na.机灵
  • Web看球看得准;留心;勤奋
na.
1.
机灵,灵敏

Sample Sentence

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