They're both beautiful—I can't make up my mind.

两个都很漂亮—我难以决定。

《牛津词典》

I can't make up my mind whether to accept the job offer.

我还没下定决心是否要接受这份工作。

youdao

My first impression of the organization was that it was not going to make enough of a difference with the plans I had in mind.

我对这个组织的第一印象是，它不会对我心中的计划产生足够大的影响。

youdao

But Helen wanted to keep trying. She said, "I think it will make my mind stronger to do it now."

VOA: special.2009.11.08

Ms. SANDY DELONG (Resident, Marysville, Michigan): I just have to make up my mind, and I'm going to weigh it out as best as I can, and then I'll go for it.

NPR: Michigan Town Weighs Presidential Choices

As a matter of fact, I consider it a privilege occasionally to attend screenings before the movies are released, and with it all the accompanying hype, because I get to make up my own mind what I think which is often less histrionic than the pros' opinions.

WSJ: Urban Gardner: Edging Into the Spotlight With a Blurb in a Movie Ad

One trip to Atlantic City was all I needed to make up my mind about casino towns.

FORBES: A Southwest Winter's Road Trip