第三人称复数：red alerts
1. (空袭) 紧急警报：黑色幽默 the humour expressing nihilism and pessimism | red alert (空袭) 紧急警报 | red cross 红十字会
2. 红色警报灭火车 灭火指挥车：Inferno消防车火地狱 爱救援,更爱打仗 | Red Alert红色警报灭火车 灭火指挥车 | Powerglide滑翔机力基又一个能飞的
1. 红色警报;红色预警;紧急状态
If a hospital, a police force, or a military force is on red alert, they have been warned that there may be an emergency, so they can be ready to deal with it.
e.g. All the Plymouth hospitals are on red alert...
普利茅斯所有的医院都处于紧急状态之中。
e.g. Sirens sounded an end to the red alert.
警报声宣告了红色预警的结束。
1. The power company in the provincial capital Guangzhou issued a red alert on electricity consumption in May.
2. Police in Jiangxi province will be on red alert when the streets are pitched into darkness by the total solar eclipse on Wednesday.
3. red alert
3. The yellow light warns the government to be alert and the red one means the disparity is totally unacceptable.
4. A red alert will indicate a bacterial food poisoning risk of at least 25 percent, while a yellow alert will mean a 15 to 24 percent risk.
5. The province issued a red alert for maritime users on Thursday as Typhoon Nuri approached, according to local flood control headquarters.
6. Shanghai received heavy rainfall on Tuesday, prompting the Shanghai Meteorological Bureau to lift the alert level from yellow to red.
7. The red alert is the highest and is issued only when the mercury rises above 40 degrees.
8. red alert
8. The government declared the country in red alert, the highest level.
9. Hong Kong has raised the Outbound Travel Alert for Israel to red, in view of the recent Gaza conflict.
10. A red alert is not welcome for most travelers but under a black alert, travel insurance becomes invalid.
noun
1. the highest level of alert when an attack by the enemy seems imminent (or more generally a state of alert resulting from imminent danger)