internal clock

US 
UK 
  • un.体内钟
  • Web生物钟;内部时钟;内时钟
un.
1.
体内钟

Sample Sentence

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