引擎在寒冷的早晨经常打不着火。

The engine often ___misfires on cold mornings.

他的笑话完全没达到效果，观众一片沉默。

His joke completely ___misfired, leaving the audience in silence.

他的笑话冷场了，因为没人听懂他的梗。

His joke ___misfired because no one got the pun he made.