translation.en: And in the investigations that followed those disasters, poor judgment as a result of extended shift work and loss of vigilance and tiredness was attributed to a big chunk of those disasters.
translation.zh: 随后的调查中发现 由于轮班工作者延长的工作时间所造成的 判断力差，丧失警惕和疲倦 是导致悲剧的主因。