A plant disease causing sunken, dead areas on bark or stems

• The dead lesion on a plant produced by such disease

植物病害，致使树皮或茎部出现凹陷坏死斑

• 由该病造成的植物坏死病斑

A corroding ulcer, especially in or around the mouth

腐蚀性溃疡，尤指口腔内外的溃疡

Something that corrupts, festers, or destroys from within

从内部腐蚀、溃烂或摧毁的事物

To corrode or eat away like a canker

• To corrupt or spoil morally or spiritually

像溃疡般侵蚀、蚀坏

• 在道德或精神上败坏、腐蚀

To fester, decay, or become diseased with canker

溃烂、腐坏，或感染溃疡病