blow hot and cold

基本解释

But now you disbelieve me. So you men often blow hot and cold.
可是，現在你又對我心懷疑慮，你們凡人就是這樣反複無常啊！
Eg. Sometimes it takes me a long time to make up my mind about something but I don't often blow hot and cold.
有時要花好長時間才下決心去做一件事，但決心一下，我就不輕易改變它。
He was not prepared to entertain, or even mix with, someone who could ‘blow hot and cold from the same mouth’.
他沒有準備好招待，甚至沒有準備好和那些可以“從同一張嘴裡既吐出冷氣又吐出熱氣”的人相識。

In fact, there's a rabbinic image, there's a rabbinic tradition that talks about this period of time, and has God and Moses talking, and God says: Listen, between the two of us, whenever I blow hot, you blow cold, or when I pour hot water, you pour cold, and when you pour hot, I'll pour cold, and together we'll muddle through, and get through here.
事實上，這裡有一個與猶太律法相關的意象，猶太律法傳統,描述了這段時間中，上帝和摩西又一次談話，上帝說：“聽著，在我們兩個人中間，儅我吹熱風，你要吹冷風，儅我潑熱水，你要潑冷水，儅你潑熱水的時候，我們潑涼水,我們將一起應付各種情形。
耶魯公開課 - 舊約導論課程節選

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
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
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

to sometimes like or be interested in something or someone and sometimes not, so people are confused about how you really feel