tail off

US /teɪl ɔf/
UK /teɪl ɔf/
"tail off" picture
1.

減弱, 下降, 逐漸消失

to become smaller or weaker, or to happen less often

:
Sales tend to tail off in the summer months.
夏季銷售額往往會下降
The applause began to tail off as the speaker finished.
演講者結束後,掌聲開始減弱