名词警惕，留心; 警觉（性）
1. 警觉：watchfully 警惕地 | watchfulness 警觉 | watchmaker 制表商
2. 警觉性：watchfully 警醒着 | watchfulness 警觉性 | watchglasscrystal 表蒙子
3. 警觉 (名)：watchfully 注意地; 警觉地 (副) | watchfulness 警觉 (名) | watchmaker 表的制造人, 钟表匠 (名)
noun
1. vigilant attentiveness
e.g. he keeps a weather eye open for trouble
Synonym: vigilance weather eye
2. the process of paying close and continuous attention
e.g. wakefulness, watchfulness, and bellicosity make a good hunter
vigilance is especially susceptible to fatigue
Synonym: wakefulness vigilance alertness