He was not prepared to entertain, or even mix with, someone who could 'blow hot and cold from the same mouth'.

他没有准备好招待，甚至没有准备好和那些可以“从同一张嘴里既吐出冷气又吐出热气”的人相识。

youdao

People who waver in their opinions and quickly change from being enthusiastic to showing disinterest are said to 'blow hot and cold'.

那些摇摆于他们的意见中，并迅速由热情变为毫无兴趣的人叫“摇摆不定”。

youdao

Sometimes it takes me a long time to make up my mind about something but I don't often blow hot and cold.

有时要花好长时间才下决心去做一件事，但决心一下，我就不轻易改变它。

youdao

In a country that used to blow hot and cold over America, Mr Lee has never wavered even when he faced anti-American riots over beef in 2008.

ECONOMIST: America and South Korea

No one can say with certainty how much influence it has on the main political groups, including the one loyal to Mr Sadr, on whom Iran's government seems to blow hot and cold.

ECONOMIST: Iraq, Iran and the United States

Of course it takes two to Tango, and the LDP and Komeito blow hot and cold toward the idea (currently more cold) so this is an outside possibility.

FORBES: As Prime Minister, Noda May Offer Something New