n.消失；失踪；绝迹
Scientists try to explain their disappearance. 科学家试着解释它们消失的原因。
His disappearance is being looked into by the police. 他失踪一事警方正在调查。
Her disappearance gave rise to the wildest rumours. 她失踪一事引起了各种流言蜚语。
n.失踪事件
