图示接触性皮炎，由致敏淋巴细胞引起的IV型超敏反应，在接触致敏性物质几天后出现。
This is contact dermatitis, a form of type iv hypersensitivity in which pre-sensitized lymphocytes led to this inflammatory reaction a couple of days after contact with the offending plant material.
灾害损失的严重程度由致灾环境的危险性、承灾体的脆弱性，以及区域的应急能力决定的。
The seriousness of disaster losses is decided by the risk degree of disaster environment, vulnerability degree of disaster body and emergency response capacity of the region.
过敏症是一种由致敏原产生的免疫系统疾病，患者可能有遗传倾向，而其它外在因素会促使患者发作。
Allergy is a disorder of the immune system, which occurs in some genetically predisposed persons with acute attacks triggered by allergen.
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