alertness
US /əˈlɝːt.nəs/
UK /əˈlɜːt.nəs/
名詞
警覺性, 機敏
the state of being watchful and quick to act; readiness
範例:
•
The guard maintained a high level of alertness throughout his shift.
警衛在整個輪班期間保持高度警惕。
•
Coffee can improve your mental alertness.
咖啡可以提高你的精神警覺性。