Definition
To express inconsistent or contradictory feelings or opinions about something; to alternate between enthusiasm and disinterest.
忽冷忽热，态度反复不定
She's always blowing hot and cold about the job; we don't know if she really wants it.
她对这份工作的态度总是反复不定，我们不知道她是否真的想要。
The project's sponsor has been blowing hot and cold about our progress, making it difficult to plan the next steps.
项目的赞助者对我们的进展态度反复不定，使得我们很难规划下一步。
He's been blowing hot and cold about joining the club, saying he wants to join one minute and then saying he is not sure the next.
他对加入俱乐部的态度反复不定，一会儿说想加入，一会儿又说不确定。