Sign in | English | Terms of Use
DictionaryForumContacts

   English ⇄
Google | Forvo | +
multi-phase sampling
busin. 多层抽样
IMF. 多阶段抽样
math. 多相抽样

 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