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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Prevent defense ： ウィキペディア英語版 Prevent defense The prevent defense is a defensive alignment in American football that seeks to prevent the offense from completing a long pass or scoring a touchdown in a single play. The alignment uses seven or more defensive backs (or players in that role), preferring fast players over large players. They back up so far that they concede short-yardage plays, but try to ensure that no receiver will be uncovered downfield or can get behind them. The prevent defense is virtually never used except when it seems clear that the offense must pass the football to gain long yardage quickly: on third-and-very-long, or with the offense trailing in the score and with time running out. ==Types of prevent== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Prevent defense」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.