plaque
n
flat (usu round) piece of stone, metal or porcelain fixed on a wall as an ornament or a memorial (裝於墻上作飾物或紀(jì)念物的石質(zhì)、 金屬或瓷制的)飾板(通常為圓形)
A simple plaque marks the spot where the martyr died. 有一塊樸素的飾板用以紀(jì)念該烈士的殉難處.
plaque n [U]
(medical 醫(yī)) soft substance that forms on teeth and encourages the growth of harmful bacteria 牙斑
It is necessary to remove plaque by brushing one's teeth. 需刷牙以去除牙斑. Cf 參看 tartar1 1.