A plaque is a flat piece of metal or stone with writing on it which is fixed to a wall or other structure to remind people of an important person or event.
例句
After touring the hospital, Her Majesty unveiled a commemorative plaque.女王陛下巡視完這家醫院后，為紀念匾揭了幕。
N-UNCOUNT
牙斑；齒菌斑
Plaque is a substance containing bacteria that forms on the surface of your teeth.
例句
Deposits of plaque build up between the tooth and the gum.牙齒和牙齦之間會滋生牙斑。
英漢詞典釋義
n.
（紀念性的）匾牌，匾額；紀念匾,飾板
Some Latin words were engraved on the plaque.牌匾上刻著些拉丁文。The local historical society put up a plaque at the site of the battle.當地的歷史學會在戰場所在地樹立了牌匾。There is a commemorative plaque to the artist in the village hall.村公所里有一塊紀念該藝術家的牌匾。
英英詞典釋義
Noun
1. (pathology) a small abnormal patch on or inside the body