trail off片語動詞KK [trel ɔf] /tɹeɪl ɔf/發音片語動詞1漸漸變小、越說越輕、說不下去Her voice trailed off as she realized nobody was listening.她發現沒人在聽,聲音就越說越輕,最後停了下來。2逐漸減少、慢慢減弱、日漸稀少Ticket sales trailed off after the first few weeks.開演頭幾週之後,票房就逐漸下滑了。