流胶现象，流胶病某些植物上〓，如甘蔗及一些果树〓，形成胶质斑块的病理现象，由病虫害〓、微生物或恶劣的气候条件侵袭而引起 The pathological formation of patches of gum on certain plants, such as sugar cane and some fruit trees, resulting from attack by insects, microorganisms, or adverse weather conditions.
这种疾病能引起面部色素斑沉著〓。 The disease causes patches of pigmentation on the face.
需刷牙以去除牙斑。 It is necessary to remove plaque by brushing one's teeth.
