His enthusiasm for his work blew hot and cold.

在工作上他总是忽冷忽热有冬有夏。

《新英汉大辞典》

Mary blew hot and cold about going to college.

玛丽对上大学一事摇摆不定。

youdao

This guy seemed to have no own always blew hot and cold.

这家伙好象没什么主张，老是摇晃不定。

youdao