vigilant
US /ˈvɪdʒ.əl.ənt/
UK /ˈvɪdʒ.əl.ənt/
1.
警惕的, 警觉的
keeping careful watch for possible danger or difficulties
:
•
The security guard remained vigilant throughout the night.
保安整夜保持警惕。
•
We must be vigilant against any threats to our freedom.
我们必须对任何威胁我们自由的行为保持警惕。