请输入您要查询的英文单词：
单词
alert
释义
alert
3
NOUN
C
/əˈlɜːt/
a warning that something dangerous has happened or is going to happen 警报；警戒
Flood alerts were issued for dozens of rivers.
数十条河流发出了洪水警报。
PHRASES
-
on alert
ready to take action to deal with a dangerous situation
（对危险的情况）警戒着，防备着
-
on the alert
paying attention to what is happening and ready to react quickly if necessary
（对事态的发展）密切注意着，随时准备着