例句與造句

1. In 1997, the UN published a study based on member state survey data titled the " United Nations International Study on Firearm Regulation " which was updated in 1999 . } } This study was meant to initiate the establishment of a database on civilian firearm regulations which would be run by the Centre for International Crime Prevention, located in Vienna . who were to report on national systems of civilian firearm regulation every two years.
2. It's difficult to find data titles in a sentence. 用data titles造句挺難的