cankern.溃疡；(树的)癌肿病；毒害；弊害v.患溃疡；腐蚀；溃烂canker sores口坏疽病canker-root[医] 黄连canker of pear梨枝枯病canker disease溃疡病canker of citrus柑桔波皮病canker of tomato番茄溃疡病canker of tea tree茶叶枝Canker in the mouth口腔溃疡canker of oxidation氧腐蚀canker of apple fruit苹果腐烂病