adj.無防備的；無人擁護(hù)的；無辯護(hù)人的
動(dòng)詞undefend的過去式和過去分詞形式.
The coast was undefended and lay open to attack . 該海岸未設(shè)防，易受攻擊。
It's single undefended spot is its fleshy, armor-less underside. 它唯一沒有防備的地方是它沒有甲片保護(hù)的腹部。
