监测发生的异常事件，比如群发性严重呼吸道疾病或者死亡；
monitoring for unusual events, such as clusters of severe respiratory illness or death;
前言：目的：探讨中学生在群发性食物中毒时的心理行为问题及防治对策。
Objective: to investigate the condition of psychological health among middle school students during outbreak of food poisoning and to explore measures to deal with this problem.
区域地质灾害的敏感性评价与诱发因素评价是区域群发性地质灾害预警预报的基础。
Regional landslide susceptibility assessment and evaluation of triggering factors are the basis of a landslide warning system.
区域降雨型滑坡是我国主要的地质灾害类型之一，具有群发性、同时性、暴发性和成灾大的特点。
Regional precipitation-induced landslide is one of the major geologic hazards in our country, which features large areas of damage, simultaneity, sudden breakout and serious consequences.
结果表明该鸡场群发性痛风是由于病鸡患肾型传染性支气管炎和误喂高蛋白饲料共同作用引起的；
The results showed that the incidence of gout were caused by avian nephropathogenic infection bronchitis virus(IBV)and high protein feed.
目的：调查分析某公司139名员工出现以腹泻、呕吐、腹痛为主要症状的群发性急性胃肠炎的原因。
Objective: to investigate and analyze the reason of an acute gastroenteritis incident that 139 employees appeared the main symptoms of diarrhea, vomit and stomachache in a company.
目的：调查分析某公司139名员工出现以腹泻、呕吐、腹痛为主要症状的群发性急性胃肠炎的原因。
Objective: to investigate and analyze the reason of an acute gastroenteritis incident that 139 employees appeared the main symptoms of diarrhea, vomit and stomachache in a company.
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