百科全书是典型的三次文献，它由各学科的众多专家撰稿。

Encyclopedia is a typical three documents, which many experts from various disciplines contributing.

youdao

采用三次文献法和专家访谈法，对蹦床的两个称谓“规定动作”和“第一套动作”进行探讨和分析。

This paper discusses and analyzes two names of "Compulsory" and "the First Routine" of trampoline by the methods of documentation of three times and expert interview.

youdao

采用三次文献法和专家访谈法，对蹦床的两个称谓“规定动作”和“第一套动作”进行探讨和分析。

This paper discusses and analyzes two names of "Compulsory" and "the First Routine" of trampoline by the methods of documentation of three times and expert interview.

youdao