Conceptual information retrieval navigation based on the subject concept tree provides convenience to the user.

基于主题概念树的概念检索导航为用户检索提供了便利。

youdao

Conceptual information retrieval navigation based on the subject concept tree provides convenience to the user.

基于主题概念树的概念检索导航为用户检索提供了便利。

youdao