on high alert 处于高级戒备状态 ; 高度警戒
high-alert medications 高危药品 ; 高警讯药品
high-alert drugs 高警讯药物
High-alert 高警讯
be on a high alert 高度戒备
On a high alert 处于高度戒备
be put on high alert 到了崩溃边缘
The armed forces were on high alert to guard against any retaliation.
武装部队保持高度警惕，以防发生任何报复行为。
我们都处在高度戒备状态。
Both sides put their nuclear forces in high alert.
双方的核力量都在高度戒备中。
Dr.Chan said all countries should immediately activate their pandemic preparedness plans and countries should remain on high alert for unusual outbreaks of influenza-like illness and severe pneumonia.
VOA: standard.2009.04.29
Speaking to local media, Pakistani Interior Minister Rehman Malik said intelligence agencies had expected attacks on security sites in the country and that authorities will remain on high-alert.
VOA: standard.2009.10.15
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