If the area is too wet, harmful organisms have a better chance to invade the tree and cause disease.

如果该区域过分潮湿，有害的微生物更有可能入侵树木，造成疾病。

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A tree can take 25 years to die if disease gets into the roots or wounds in the bark.

如果病菌侵入它们的根或者伤害了它们的树皮，一棵树在死亡之前还可以挺25年。

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RESULTS: To mine date in archiving database of SR and form the decision tree in disease knowledge base with 12 nodal points, which stored in knowledge base.

结果：挖掘结构化报告归档数据库中诊断报告的数据资料，形成带有12个节点的疾病知识库决策树，在知识库中存储。

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The Forestry Commission announced on Monday that the tree disease chalara had been found in woodland in Kent and Essex.

BBC: Ash dieback chalara cases confirmed in Essex

"It's quite galling for us to have to do all this because basically yet again the government has missed the boat on a serious outbreak of tree disease, " he said.

BBC: Essex

It doesn't seem to be affected all that much by climate, soil conditions, geographical location, growth rate, tree size or disease.

NPR: Excerpt: 'A Splintered History Of Wood'