alertness

ә'lә:tnis

n. a state of readiness to respond
n. lively attentiveness

n. 警戒, 机敏

19,835

BNC 频率

18,261

使用频率

alertness 由词根 alert（警觉的）和名词后缀 -ness（状态）构成，表示“警觉的状态”。

例句

1. Staying alertness while driving is very important for safety.

开车时保持警觉性对安全非常重要。

2. The teacher noticed a lack of alertness in the students during the lecture.

老师注意到学生在讲座期间缺乏警觉性。

3. Regular exercise can improve your mental alertness.

定期锻炼可以提高你的心理警觉性。