2. Secondly, after entering HowNet official website, click the "Advanced Search" option on the right side of the search bar.
3. Finally, in the advanced retrieval state, select the retrieval results in the "foreign literature" area, such as "light" and "agriculture" here, and then search. Reference refers to the whole reference or reference to a book or a paper in the process of academic research. The cited documents have been noted in the notes and no longer appear in the following references.