WordNet

anything that happens suddenly or by chance without an apparent cause; "winning the lottery was a happy accident"; "the pregnancy was a stroke of bad luck"; "it was due to an accident or fortuity" (同)stroke, fortuity, chance event
an unfortunate mishap; especially one causing damage or injury
a European river; flows into the Adriatic Sea (同)Po River

PrepTutorEJDIC

〈C〉『偶然』,偶発,めぐり合わせ / 〈C〉『事故』,災難
poloniumの化学記号

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1. ラテンアメリカおよびカリブ海諸国への旅行によって感染する可能性のある疾患 diseases potentially acquired by travel to latin america and the caribbean
2. メソアメリカ腎症 mesoamerican nephropathy
3. 高齢ドライバーの評価に対するアプローチ approach to the evaluation of older drivers
4. ロボミコーシス lobomycosis
5. 痙攣発作およびてんかんを有する患者に対する自動車運転の制限 driving restrictions for patients with seizures and epilepsy

「ポザ・リカ事件」

　　[★]

英: Poza Rica Accident
関: 硫化水素中毒

1950年11月メキシコベラクルス州ポザリカで、ガス工場の事故により大量の硫化水素ガスが漏れ出し、住民22000人中22人が死亡した。後に、盆地の中で弱風状態にあったことや霧が発生していたことが被害を大きくしたと分析されている(wikipedia)
In geothermal areas there is a risk of exposure to hydrogen sulfide for the general

population (2). The biodegradation of industrial wastes has been reported to cause ill effects in the general population (2). An accidental release of hydrogen sulfide into the air surrounding industrial facilities can cause very severe effects, as at Poza Rica, Mexico, where 320 people were hospitalized and 22 died (2). The occurrence of low-level concentrations of hydrogen sulfide around certain industrial installations is a well known fact.(参考2)