请问这个短语怎么翻

支出expenses/expenditure 本来就没有回报，只有投资investment 才谈得上回报，这句话本身就有问题。

Non-return investment

经济学上
expendable 就是了

an expenditure without any return/reward

non-rewarded expenses/non-rewarding expenses 两者选其一吧。具体是过去分词还是现在分词，我也不太会了。

no return expenditure.

efforts without rewards