plaque

A bronze plaque on the building marks the spot where the famous author was born.

(Chinese) 建筑物上的一块青铜牌匾标志着这位著名作家的出生地。

The historical society installed a plaque to honor the soldiers who died in the battle.

(Chinese) 历史协会安置了一块纪念牌，以纪念在战斗中牺牲的士兵。

Regular brushing and flossing help to remove plaque and prevent tooth decay.

(Chinese) 定期刷牙和使用牙线有助于清除牙菌斑并预防蛀牙。

If not removed, plaque can harden into tartar, which only a dentist can clean.

(Chinese) 如果不清除，牙菌斑会硬化成牙石，只有牙医才能清理。