The windows are covered with grilles to deter vandals.

窗戶都安了铁柵栏，以防止故意破坏。

The seat-covers on the train had been ripped by vandals.

火车的座位套子被破坏公物者故意撕破。

Vandals slashed the paintings with knives.

破坏公物者用刀划破了那些绘画作品。