on the back burner
US /ɑn ðə bæk ˈbɜrnər/
UK /ɑn ðə bæk ˈbɜrnər/

1.
搁置, 暂缓处理
if something is on the back burner, it is temporarily not being dealt with or considered, because it is not urgent or important
:
•
We've put the new project on the back burner for now.
我们暂时把新项目搁置起来了。
•
My career took a back seat when I had children, but now it's no longer on the back burner.
生孩子后我的事业退居二线,但现在它不再被搁置了。