资源库里其实有mdx，也有pdf。
You may find mdx and pdf in Resource library.
Index of /尚未整理/共享2020.5.11/content/1_english/z_dictionary_others/Easier English Student Dictionary/
搜索关键词(Keyword to search)：student
资源库的检索链接见：
(For a link to Resource library search, see the link below)