yellow alert

Twain's complaints about the impenetrable murk alert us to the fact that London's yellow pea-soupers ( a term that derives from a much despised broth) were not confined to its streets.

吐温抱怨这团看不透的黑暗雾霾，这让我们知道，遍布伦敦的黄色浓雾（它还有个别名叫“豌豆汤”，是一种非常难喝的汤）不仅仅是街头才有。

South Korean authorities changed the status of the case of a woman who had travelled to Mexico City to "probable" infection from "suspected" and raised its national alert level by one notch to "yellow".

韩国政府将一名从墨西哥城旅行归来的女士的病例状态从“疑似”感染改为“可能”感染，并将该国的警戒级别提升一级至“黄色”。

For avoiding hit accident of group drilling, the group drilling defend yellow alert system was designed.

为防止丛式钻井碰撞事故的发生,设计了丛式钻井防碰预警系统.

All Stations, we are at Yellow Alert.

所有战位, 我们进入黄色警戒.