sitting duck
近义词：goat，prey，easymark，
英英释义
Noun
- a defenseless victim
例句
用作名词(n.)
- The American warships in Pearl Harbor were sitting ducks.珍珠港的美国军舰是必定击中的目标。
- Your airspeed will drop quickly, and a slow ship under fire is a sitting duck.因为你的空速将急剧下降，低速飞机在火力下将成为极易击中的靶子。