alert ·verb
Definition: to warn someone of a possibly dangerous situation Level: C2
气象部门警告居民即将到来的严重雷暴。
The weather service ___alerted residents to the impending severe thunderstorm.
这篇文章警告读者社交媒体上错误信息的潜在危险。
The article ___alerted readers to the potential dangers of misinformation on social media.
这项新研究警告政策制定者迫切需要采取气候行动。
The new study ___alerted policymakers to the urgent need for climate action.