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》

Drivers must be on the alert for traffic signals.

驾驶员必须密切注意信号。

youdao

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

Investors now know that funds are not inherently safe and that they should always be on the alert for self-dealing by advisers, brokers and other intermediaries.

FORBES: The Great Mutual Fund Clean Up That Almost Happened (April 4, 2004 )