alert的意思

基本释义

• v 警告；使警觉，使意识到

  to make someone realize something important or dangerous

• adj 警惕的，警觉的；留心的

  giving all your attention to what is happening, being said etc

• n 警戒，警惕；警报

  a warning to be ready for possible danger

例句

1. The school immediately alerted the police .

   学校立即报了警。

短语

• alert someone to sth 使...警觉；使...警惕
• on the alert 提防；警戒著；随时准备著
• red alert 紧急警报，红色警报；应急状况

近义词

同根词