Do you have a mental picture of what it will look like?

在你脑子里它会是什么样子？

To form a mental picture or image of.

象形文字里的一个图形字符。

Choose a certain plan, idea, or mental picture.

选择某一个计划、理念、或心理暗示图片。

It's a little mental picture of my body in a coffin.

想象我的身体在棺材里的画面。

The brain, in other words, builds a mental picture or model.

换言之，大脑建立心理图像或模型。