red alert n. 应急状态(紧急警报) 例句与用法: The district was put on red alert during a terrorist bomb scare. 这个地区在得到恐怖主义者轰炸后作了应急准备。 词形变化: 副词: redly | 形容词比较级: redder | 形容词最高级: reddest | 名词: redness | 详细释义: ph. 紧急警报; 紧急状况