They were alarmed by a sudden attack.
突然袭击使他们大为惊恐。
Vertigo: Female patients are more likely to squat or from a sudden attack immediately.
眩晕：女性患者呈现较多，可能会在忽然蹲下或起立时爆发。
They were alarmed by a sudden air attack.
突然空袭使他们大为惊恐。
A panic attack is a sudden feeling of terror.
惊恐发作会有一种突然间恐惧的感觉。
A strong defence system offers protection from sudden attack by the enemy.
坚固的防御系统提供保护以防备敌人的突袭。
Doctor: She had a sudden heart attack.
医生：她心脏病突发。
He passed away at home after a sudden heart attack.
他心脏病突发，溘逝在自己家里。
The citizens were warned to be on guard against a sudden night attack.
市民们得到通知，要提防夜间的突然袭击。
The citizens were warned to be on guard against a sudden night attack.
市民们得到通知，要提防夜间的突然袭击。
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