未设防 meaning in English

unfortified

The u . s . border with canada , 6400km from the atlantic to the pacific oceans , has been described as the world ' s longest un - defended international boundary
美国与加拿大从亚特兰大到太平洋海岸长达6400公里的边界线被称作是世界上最长的未设防的国际边界线。
( 3 ) from the structure measure , each element could n ' t satisfy the need completely . it should be emphasized that the equipments that had n ' t set drop - prevent beams were not matching the need
还应特别指出的是在排架盖梁上未设防落梁（槽）的装置，不符合抗震要求。
Since my basic strategy is to throw every available unit right at my enemies , i ' ve found i have to start holding some forces back in case my enemy manages to find a way to hit me in an unguarded location
所以尽管我的基本策略还是将每个卒子投入到与敌正面斗争中，我还是得在后方留点预备队以防一旦被敌人攻击后方的未设防区域。
The note submitted by bennigsen , and the report sent in by the cossacks of the enemys left flank being unguarded , were simply the last straws that showed the inevitability of giving the signal for advance , and it was arranged to advance to attack on the 5th of october
贝尼格森所呈交的有关必须发动进攻的意见书和那个哥萨克所做的关于法军左翼未设防的报告，只不过是必需下达进攻命令的最后迹象罢了，于是决定十月五日开始进攻。