"on the alert" in Chinese (Traditional)

• 保持警惕
• 保持警覺

Definition

隨時注意危險或能迅速反應；密切關注可能的問題或威脅。

Usage Notes (Chinese (Traditional))

通常用在需要提高警覺的場合，比如安全警告；比“保持警覺”更正式，強調隨時注意，重點在防範而非直接防守。

Examples

The guards stayed on the alert all night.

警衛們整夜都**保持警覺**。

Be on the alert for any suspicious people.

對任何可疑人員都要**保持警覺**。

The police were on the alert after the robbery.

搶劫後，警察一直**保持警覺**。

You have to stay on the alert when driving late at night.

深夜開車時必須**保持警覺**。

After hearing strange noises, she was immediately on the alert.

聽到奇怪的聲音後，她立刻**保持警覺**。

Travelers should always be on the alert for scams in big cities.

旅客在大城市要隨時**保持警覺**，防騙。