1.警惕的,警觉的
2.机警的,机灵的
1.警戒;警报
2.警戒期间
3.【军】紧急待命
1.使警戒
1.able to think in a clear and intelligent way
2.paying attention to what is happening and ready to react quickly if necessary
1.a warning that something dangerous has happened or is going to happen
1.to tell someone in authority about a danger or problem so that they can take action to deal with it
2.to tell someone about something that may affect them