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同义词： assailable undefendable open
以上来源于: WordNet
ADJ not having people to provide resistance against danger, attack, or harm 未设防的
defenseless
The coast was undefended and lay open to attack.
该海岸未设防，易受攻击。
youdao
It's single undefended spot is its fleshy, armor-less underside.
它唯一没有防备的地方是它没有甲片保护的腹部。
Most of those are undefended - only 36, 000 debt cases went to trial in 2000.
BBC: Web page
Such fuel convoys are typically escorted by Pakistani military, but these convoys appears to have been undefended.
FORBES: Significance Of Attacks On Pakistan Oil Convoys
Management appeared unprepared to tackle the absence of success, it said, leaving swimmers feeling "undefended, alone, alienated".
BBC: Australia London 2012 Olympic swim team 'toxic'
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