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.

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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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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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