keep a lookout for
US /kiːp ə ˈlʊk.aʊt fɔːr/
UK /kiːp ə ˈlʊk.aʊt fɔːr/
1.
留意, 警惕
to watch carefully for someone or something, especially to prevent danger or to find something specific
:
•
Please keep a lookout for the delivery truck.
請留意送貨卡車。
•
We need to keep a lookout for any suspicious activity.
我們需要留意任何可疑活動。