针对是否买下那辆车，我下不了决心。

I cannot make up my mind whether I should buy the car.

youdao

我很可怜这个身体上受着饥饿、心灵上又担负着理论重负的人，对于我的拉丁文，我虽然不抱任何进步的幻想，但我也下不了决心把他辞退。

I felt keenly for the poor body-starved theory-burdened soul, and though I was under no delusion as to the assistance I got in my Latin, I could not make up my mind to get rid of him.

youdao

我也知道不该——可就是下不了决心扔掉。

I knew it was - but had not resolution enough to part with them.

youdao