| 单词 | line of defense |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔breakthrough〕A military offensive that penetrates an enemy's lines of defense.突围：突破敌人防线的军事攻击美国传统〔front line〕These researchers are on/at the front line of defense against cancer.这些研究人员奋战在抗癌的第一线。韦氏高阶〔gap〕A break in a line of defense.防线缺口美国传统〔linebacker〕Any of the defensive players forming a second line of defense behind the ends and tackles.中后卫：在边线和阻截队员之后形成第二道防线的任一个防守队员美国传统 |
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