短语词组短语Serious individual defect product 严重的单个不良serious tooth defect 重度牙体缺损the more serious defect 严重缺陷serious defect fruit 严重缺陷果the most serious defect 致命缺陷serious periodontopathy with dentition defect 重度牙周病伴牙列缺损 返回 serious defect