vigilant /ˈvɪdʒɪlənt/ TEM4

• 1. 

  ADJ Someone who is vigilant gives careful attention to a particular problem or situation and concentrates on noticing any danger or trouble that there might be. 警惕的

  例：

  He warned the public to be vigilant and report anything suspicious.

  他告诫公众要保持警惕，报告任何可疑情况。

• 2. 

  vigilance N-UNCOUNT 警惕

  例：

  Constant vigilance is needed to combat this evil.

  同这种邪恶作斗争需要时刻保持警惕。