1. His dog has a canker in its ear. 他的狗的耳朵上有一处“溃疡”。
2. 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。
3. Caution: Don't use it when skin has cut, canker, whelk grouting and eczema. 注意事项：皮肤有伤口，溃烂，青春痘灌浆，湿疹，等情况下不可以使用。
英英解释
n.
1. a fungal disease of woody plants that causes localized damage to the bark
2. an ulceration (especially of the lips or lining of the mouth)
3. a pernicious and malign influence that is hard to get rid of v.
1. become infected with a canker
2. infect with a canker
