I had a mental image of what she would look like.

我想象出她的大致模样。

《牛津词典》

youdao

It creates in the mind a mental image of weakness.

它在脑中形成的影像是负面的。

youdao

The actress says she hopes "Pax" can change the public's image of mental illness,including PTSD.

VOA: standard.2010.05.18

I've got a little mental image of my body lying in bed asleep, dreamlessly.

我脑子里有个画面,画面中我躺在床上，高枕无梦。

耶鲁公开课 - 死亡课程节选

No one has a mental image of Henry (Red) Sanders, the coach who used the phrase first.

NEWYORKER: Notable Quotables

Every one of Journe's new watches starts with his mental image of the dial, not its mechanics.

FORBES: Magazine Article

His drawings and paintings reflect a romantic vision which still shapes many people's mental image of the countryside.

BBC: Urban v rural: Which is better?