a·lert·ness
noun/əˈlɜːtnəs/
/əˈlɜːrtnəs/
[uncountable]- the ability to think quickly and to notice things
警觉的；警惕的；戒备的 - Sleep deprivation could affect mental alertness.
睡眠不足可能会影响精神警觉性。
- Sleep deprivation could affect mental alertness.
- the fact of being aware of something, especially a problem or danger
意识到，注意到（问题或危险） - With a real threat of ambush, the crews remained at a high state of alertness.
面对真正的伏击威胁，船员们保持高度戒备状态。
- With a real threat of ambush, the crews remained at a high state of alertness.