1. 变小,变少,变弱：2514tail away变小,变少,变弱 | 2515tail off变小,变少,变弱 | 2517take a pleasure in以...为乐

1. (声音)逐渐变弱，逐渐消失
    When a person''s voice tails away or tails off, it gradually becomes quieter and then silent.

tail away

    e.g. His voice tailed away in the bitter cold air...
           他的声音在刺骨的寒风中越来越微弱。
    e.g. Benedict''s voice tailed off, then resumed.
           贝内迪克特的声音渐渐小到快听不见时又大了起来。