proper motion

US 
UK 
  • na.【天】自行
  • Web固有运动;北斗七星的自行;正常运动
na.
1.
【天】自行

Sample Sentence

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