The u . s . border with canada , 6 , 400 kilometers from the atlantic to the pacific oceans , has been described as the world ' s longest undefended international boundary 从大西洋到太平洋，美国与加拿大那长达6400公里的国界被认为是世界上最长的无保护国界。
The u . s . border with canada , 6 , 400 kilometers from the atlantic to the pacific oceans , has been described as the world ' s longest undefended international boundary 美国与加拿大接壤的边界从大西洋至太平洋长达6 , 400公里，被描述为世界上最长的无设防的国界。
The u . s . border with canada , 6 , 400 kilometers from the atlantic to the pacific oceans , has been described as the world ' s longest undefended international boundary 美国与加拿大的边境，从大西洋到太平洋总长有6400公里，被称之为世界上最长的无防备国际边境。
The u . s . ( border ) boarder with canada , ( 6 , 400 ) 60 , 000 kilometers from ( the ) atlantic to the pacific oceans , has been decribed as the world ' s longest undefended international boundary 美国与加拿大的边界长达6400英里，从大西洋一直延伸到太平洋，它是世界上最长的国际上不设防备的边界。
Around 1 : 30pm , the crowd surged into the undefended outer courtyard . about this time gunfire began , though which side actually fired first will never be conclusively decided 下午1 : 30分左右，人群涌入到没有设防的外院。大约就在这时，开始交火，不过，对于到底是哪方先行开火是永远都不会有定论了。
But too many americans would be left undefended or underdefended , and too many militias and insurance companies would devote so much money and manpower to cost - shifting battles that they would lack sufficient funds to extend coverage or maintain existing coverage at an affordable level 但是将会有太多的美国公民处于没有恰当的防卫或者毫无防卫的状态，而大多数雇佣军团和保险公司将会把大量人力和财力投入到保险额的风险转移*当中，而没有余力扩大其保险范围或是将现有的保险维持在一个比较合理的价格范围内。
