Sign in | English | Terms of Use
DictionaryForumContacts

   English ⇄
Google | Forvo | +
to phrases
core concept
avia. 核心概念
core concept: 1 phrase in 1 subject
China1

 The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error | Get short URL | Language Selection Tips