alertness

• 名词，指警觉、留神和反应敏捷的状态，对变化或潜在危险保持高度注意。

A noun referring to the state of being watchful, attentive, and quick to notice or respond to changes or potential dangers.

不可数

1. Close and continuous attentionB2formal

   The state of paying careful and uninterrupted attention to something.

   警觉

   • The driver's alertness prevented a potential accident.
   • Her alertness during the lecture helped her understand complex topics.
   • Security guards must maintain constant alertness.

   同义词attentivenessawarenesscircumspectionconcentrationvigilancewatchfulness

   反义词carelessnessdistractioninattentionnegligenceobliviousness

2. State of readiness to respondB2formal

   A condition of being prepared to react quickly to a situation or stimulus.

   警觉性

   • The soldiers were in a state of high alertness.
   • His alertness allowed him to catch the ball before it hit the ground.
   • Emergency workers need to maintain alertness at all times.

   同义词attentivenessawarenesspreparednessquicknessreadinessvigilancewatchfulness

   反义词inattentionunawareness

3. Lively attentivenessB2formal

   A quality of being mentally sharp, quick, and actively aware of one's surroundings.

   警觉

   • The child's alertness impressed the teacher.
   • Coffee helps improve my alertness in the morning.
   • Her natural alertness made her an excellent detective.

   同义词attentivenessawarenessobservanceperceptivenessquicknesssharpnessvigilancewakefulnesswatchfulness

   反义词dullnessinattentivenesslethargyobtusenesssluggishnesstorpor