trail off

英 [treɪl ɒf]

美 [treɪl ɔːf]

（声音）逐渐减弱，越来越小

柯林斯词典

• PHRASAL VERB (声音)逐渐减弱，越来越小
  If a speaker's voice or a speakertrails offortrails away, their voice becomes quieter and they hesitate until they stop speaking completely.
  1. 'But he had no reason. He of all men...' Kate's voice trailed off.
     “但是他没有任何理由。在所有人当中…” 凯特的声音越来越轻。

双语例句