1·There were 15 minutes between the first air raid alert and the sounding of the all-clear signal.
从第一个空袭警报到警报解除号音其间有15分钟。
—— 《柯林斯英汉双解大词典》
2·When the system thinks it's being jammed, it'll notify you via push alert .
如果系统判断受到干扰，就会推送警报来通知你。
3·We edited Figure 11 below, so you could see all the questions that are related to a spilled sort alert.
我们对下面的图11进行了编辑，这样您就可以看到与排序溢出警报有关的所有问题。
4·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。
5·With the right device tuned to the right frequency, what's to stop a thief from jamming your setup and blocking that alert signal from ever reaching the base station?
通过将正确的设备调整到正确的频率，如何防止小偷干扰你的设备阻止警报信号到达基站呢？
1·The security alert brought the airport to a standstill.
安全警戒使机场陷入停顿状态。
—— 《牛津词典》
2·They were quiet during the alert.
警戒期间他们保持安静。
3·Swine flu has become the world's first official pandemic in 41 years after the world Health Organisation raised the alert level on the H1N1 virus from phase 5 to 6, the highest on the scale.
世界卫生组织宣布将甲型H1N 1流感病毒的警戒级别由5级提升至最高级别6级，至此，猪流感已成为41年来世界上第一个正式的全球大流行病。
4·Similarly, high-level events can be decomposed into one or more low-level events or actions; for example, changing a pressure control valve, sounding an alarm, or signaling an alert.
类似地，高层次事件能够被拆分成一个或者多个低层次事件或动作；例如，更换压力控制阀、拉响警报或发出警戒信号。
5·The WHO's alert level for the virus remains at phase five of six, meaning a global outbreak is imminent.
猪流感病毒在世卫组织的六个警戒级别的仍然在第五级，这意味着马上就要全球爆发。