alert

提醒；使〔某人〕意识到vv

机警的adjadj

Red Alert (红色警戒) 是风靡全球的电脑游戏记忆

1 alert someone to sth使...警觉；使...警惕

2 on the alert提防；警戒著；随时准备著

3 red alert紧急警报，红色警报；应急状况

1 真题例句...if the left hemisphere was staying alert to keep guard in a strange environment...CET42017.12阅读理解

2 真题例句...but instead will alert their friends...CET42008.12阅读理解

1 campaigns to alert the public to the dangers of HIV.让公众意识到艾滋病病毒危险的宣传活动

2 Taking notes is one of the best ways to stay alert in lectures..记笔记是听课时集中注意力的最佳方法之一。