基本解释[毉葯科學]釉質白堊斑英汉例句雙語例句Objective: To prevent enamel opaque spot after orthodontic etching.目的：預防口腔固定正畸酸蝕牙釉白斑的發生。enamel opaque spot更多例句专业释义毉葯科學釉質白堊斑