effective duration

US 
UK 
  • un.有效历时;有效工作时间
  • Web有效久期;有效期限;有效持续期
un.
1.
有效历时
2.
有效工作时间

Sample Sentence

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