Lecture is a high level service of information broadcasting, knowledge increasing and reader leading.

讲座是传播信息、深化知识、引导读者的一种高层次知识服务。

youdao

Lecture is a high level service of information broadcasting, knowledge increasing and reader leading.

讲座是传播信息、深化知识、引导读者的一种高层次知识服务。

youdao