hang by a thread片語KK [hæŋ baɪ ə θrɛd] /hæŋ baɪ ə θɹɛd/發音片語1危在旦夕、命懸一線After the accident, his life hung by a thread for days.事故之後,他的生命危在旦夕,持續了好幾天。2岌岌可危、搖搖欲墜The peace agreement now hangs by a thread.這份和平協議如今已岌岌可危。