If they detect something wrong while the system is armed, they'll transmit a wireless alert signal to a base station that will then raise the alarm.

如果他们在系统布防时发现了什么问题，就会向基站发送无线警报信号，然后基站会发出警报。

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With the right amount of sleep you should wake up fresh and alert five minutes before the alarm rings.

有了适量的睡眠，你就应该在闹钟响前的五分钟精神抖擞地醒来。

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Actions to take upon a warning, alarm, or attention alert.

针对提醒、报警或注意警报所采取的行动。

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The STYLISTIC S01 is also equipped with a loud personal security alarm that can be used to alert people in the surrounding area in emergency situations.

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Wake up refreshed and alert thanks to a wide range of customizable alarm sounds and be prepared for any eventuality, come rain or shine, with Halo 3's animated weather.

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Carl Lavin, Forbes.com managing editor, said that the initial alarm about the data was sounded by an alert reader.

FORBES: Magazine Article