A flat plate, slab, or disk that is ornamented or engraved for mounting, as on a wall for decoration or on a monument for information.是什么意思_A flat plate, slab, or disk that is ornamented or engraved for mounting, as on a wall for decoration or on a monument for information.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句