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不幸， ふこう
1. unhappiness, sorrow, misfortune, disaster, accident
2. death (usu. of a relative), bereavement
不幸、悲伤、厄运、灾祸、意外
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責任， せきにん
1. duty, responsibility (incl. supervision of staff)
2. liability, onus
责任；责任，举证责任
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
