a fungal disease of woody plants that causes localized damage to the bark
an ulceration (especially of the lips or lining of the mouth)
a pernicious and malign influence that is hard to get rid of;
"racism is a pestilence at the heart of the nation" "according to him, I was the canker in their midst"
Verb
become infected with a canker
infect with a canker
例句
用作名词(n.)
Fatigue, stress or allergies can increase the likelihood of a canker sore.疲劳，压力或过敏能增加口腔溃疡发作的可能性。
Anecdotal evidence suggests that diets high in sugar, citrus, and cereal grains may trigger canker sores.有事实证据表明大量饮用糖，柑橘，谷粒或许会触发口腔溃疡。
用作动词(v.)
When with stainless steel or carbon steel, the interior must line with rubber processing, preventing to canker shell material.用不锈钢或碳钢制作时，内部需衬胶处理，以防止腐蚀壳体材料。
