该警告旨在使欧洲的美籍人员保持警惕，尤其是在公共场合，如公交车站，机场和旅游景点。

The alert is expected to urge American citizens in Europe to be vigilant, especially when in public places such as public transportation, airports, and tourist sites, officials said.

youdao

你想使她放松警惕抓住她。 那就要求你去搭讪时，她停止品评你。

You want to catch her with her guard down and that requires that she stop sizing you up when you strike up a conversation.

youdao

缺乏教育使很多当地的医生和助产士对感染了HIV病毒的妇女心存警惕，特别是在生产时缺乏常规预防措施(如外科手术手套)的情况下。

Lack of education can make doctors and midwives more wary of women with HIV, particularly if standard universal precautions (such as surgical gloves) are not available during delivery.

youdao