1. 突击巡察有助于使员工常备不懈
Surprise visits help to keep the staff on their toes.

《牛津词典》

2. 他们一直处于常备不懈状态以防突然袭击。
They were constantly on the alert not to be taken by surprise.

《新英汉大辞典》

3. 他们一直处于常备不懈状态以防突然袭击。
They were constantly on the alert not to be taken by surprise.

《新英汉大辞典》