They say the government is not doing enough to investigate tens of thousands of killings and disappearances over the past few years.他们说政府在调查过去的数年中发生的成千上万的谋杀和失踪事件上做得并不够。The concurrence of their disappearances had to be more than coincidental.他们的同时失踪肯定不仅仅是巧合。The concurrence of their disappearances had to be more than coincidental.他们同时失踪肯定不仅仅是巧合。Police are investigating several mysterious disappearances.警方正在调查几起神秘的失踪案件。