keep guard

• 保持警惕，保持戒备，或对某人或某物维持保护性的姿态，常用于安全或防卫的语境中。

To remain watchful, stay alert, or maintain a protective stance over someone or something, often in a security or defensive context.

1. Watch over or protectB1formal

   To stay alert and watch over someone or something to ensure safety or prevent escape.

   看守

   • The soldiers were ordered to keep guard at the entrance.
   • She kept guard over the children while they played in the park.
   • The security guard kept guard all night long.

2. Maintain a defensive positionB2formal

   To remain in a state of readiness to defend or protect against potential threats.

   守卫

   • The goalkeeper kept guard in front of the net.
   • The dog kept guard by the front door.
   • They kept guard over the treasure chest.