undefended

adj.

1. 不设防的；不加防御的
   not protected or guarded
   1. undefended borders
      不设防边界
2. 无抗辩的；不作辩护的
   if a case in court is undefended , no defence is made against it

1. Bombs and poison gas would rain down on undefended cities.
   炸弹毒气弹纷纷投向那些没有防御的城市。
2. This will leave the base relatively undefended.
   这样整个基地就会相对无人防守。
3. The coast was undefended and lay open to attack.
   该海岸线未设防，很容易遭受攻击。
4. Americans have a special relationship with Canadians with whom they share the world's longest undefended border.
   美国人与加拿大人有一种特殊的关系。美加两国的边界是世界上最长的不设防边界。
5. Meanwhile, military satellites are completely undefended and vulnerable to attack.
   同时，军用卫星不但易受攻击，而且对攻击毫无抵御能力。
6. Yet, as I clung to this kind stranger, wholly undefended, my sense of wellbeing soared.
   然而，当我靠着这个亲切的陌生人时，毫无防卫的，我心里骤然生起安全感。
7. But the vast countryside area basically is at the undefended condition at the coping and handing aspect of the burst characteristics public event, and temporarily processes the question again.
   而广大农村，在突发公共事件应对和处置方面，基本上处于不设防的状态，遇到问题再临时处理。
8. Hidden curriculum can be divided into three categories in terms of structure: physical form, spiritual form, and institutional form, which is unconscious, hidden and undefended.
   高校隐蔽课程从结构上可分为物质形态、精神形态和制度形态，它具有隐蔽性、无意识性、无逆反性等特征。
9. Canada and the United States is close to the two countries to implement the common defense in the military, is the only undefended border the two countries.
   加拿大和美国是紧邻，两国在军事上实行共同防务，是世界上唯一的边界不设防的两个国家。

adj

1. not defended or capable of being defended
   1. an open city
   2. open to attack

   Synonym:    assailableundefendableopen