on the back burner idiom
（尤指因不紧急或不重要而）暂时搁置一边
If something is on the back burner, it is temporarily not being dealt with or considered, especially because it is not urgent or important.
We've all had to put our plans on the back burner for a while. 我们大家都只好把计划暂时搁置一段时间。