They want to be on the alert for similar buying opportunities.

他们要准备应对类似的购买机会。

《柯林斯英汉双解大词典》

Police are warning the public to be on the alert for suspicious packages.

警方警告公众要警惕可疑包裹。

《牛津词典》

Yellow - be on the alert.

黄灯表示警告状态。

youdao

General Fonseka,in the letter, says Sri Lanka asked India on October 15 to place troops on alert in case they would be needed to intervene to foil a coup on the island.

VOA: standard.2009.11.14

Planned Parenthood has to be on the alert already given the episodes over the last month.

FORBES: Planned Parenthood Opponents Want to Recruit High School Videographers

You can be the one to be on the alert for their financial safety.

FORBES: The Case of the Missing Cash

When a fifth wave is extended, we should be on the alert for a sharp correction once that wave completes its run.

FORBES: Elliott Waves Show Wipeout Dead Ahead For British Pound