secondary source

美 
英 
  • n.二手资料
  • 网络第二手史料;第二来源;次要光源
secondary source
n.
1.
二手资料a book or other source of information where the writer has taken the information from some other source and not collected it himself or herself

例句

释义:
类别:全部全部,口语口语,书面语书面语,标题标题,技术技术
来源:全部全部,字典字典,网络网络
难度:全部全部,简单简单,中等中等,