除去不断上涨的失业率(一个迟滞的指标)，消费者的实际购买了是增长了，而不是下降了。

Regardless of rising unemployment (a lagging indicator), real consumer buying power is going up not down.

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点式感烟探测器是目前民用建筑中最为广泛使用的火灾探测设备，其中离子感烟探测器是一典型的点式感烟探测器，迟滞时间是反映点式感烟探测器对环境变化跟随性的指标。

Nowadays, point-type fire detectors are widely used in civil buildings and the lag time is a parameter which reflects the response of the point fire detector to environmental change.

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