黄色警戒是《命令与征服：红色警戒2》的玩家自制的一个扩展程式。
走出花店后，奥巴马还与等候在黄色警戒线外的围观群众们亲切握手，之后便钻进了他的“雪佛兰巨无霸”。
Outside the florists, Obama delighted onlookers waiting behind yellow police tape by stopping to shake hands before getting back in his Chevrolet Suburban.
图中，黄色和红色的线条表示警戒阈值。
The yellow and red line on the chart above represents the alert thresholds.
们里面隔着一道平日不常见的警戒线，是黄色的。
Were not in the habit which is separated from a common cordon , is yellow.
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