open letters is open letter's Plural Form

open letter

US 
UK 
  • na.公开信
  • Web空心字体;开启信件;开放性的书函
Plural Form:open letters  
na.
1.
公开信

Sample Sentence

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