例句與造句

1. For physics papers the Physics and Astronomy Classification Scheme ( PACS ) is often used.
2. The listed subdisciplines are loosely based on the PACS ( Physics and Astronomy Classification Scheme ) coding used by the Acoustical Society of America.
3. The topic area of every article is classified by either the Physics and Astronomy Classification Scheme ( PACS ) or the Mathematics Subject Classification ( MSC ).
4. It's difficult to find physics and astronomy classification scheme in a sentence. 用physics and astronomy classification scheme造句挺難的