我已在这计划中投入了大量的时间和精力。

I've invested a lot of time and effort in this plan.

youdao

我对专业课投入了大量的时间和精力。

I've invested a lot of time and effort in my major.

youdao

我对专业课投入了大量的时间和精力。

I've invested a lot of time and effort in my major.

youdao