D. F.

US 
UK 
abbr.
1.
(=Dean of the Faculty)(大学的)系主任
2.
(=direction finding)测向
3.
(=Doctor of Forestry)林学博士

Sample Sentence

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