normal close(常闭状态):在警戒状态,系统报警输出部件接点是“闭合”的状态。 normal open(常开状态):在警戒状态,系统报警输出部件接点是“开路”的状态。
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在这段时间内,章鱼母亲一直在警戒状态。
例如,她证实,在911事件之前,白宫已经出于高度警戒状态,但是他冷谈的说:“历史记录没有反映出这些。”
For example, she testified that the White House was on high alert before 9/11, but, he dryly notes, “the historical record does not reflect this.”
来往频繁的油轮使这片海域一直处于可能发生石油泄漏的高度警戒状态下,而世界自然基金会估计,在未来10年里,仅从波罗的海通过的油轮数就可能翻一番。
The area is permanently on high alert for spills because of intense tanker traffic, which the World Wide Fund for Nature estimates could double in the next 10 years in the Baltic alone.
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