The civilians panicked when they realized they were under fire.平民们意识到他们遭到枪击时惊慌失措。

As a soldier he showed extraordinary skill and courage under fire.作为一名士兵，他在枪林弹雨中表现出非凡的技能和勇气。

He is under fire from his political opponents.他遭到了政敌的批评。

The company has come under fire [=has been criticized] for using child labor overseas.这家公司因为在海外雇用童工而受到谴责。