1. to light something and make it brighter. [照亮]

2. to explain and show more clearly something that is difficult to understand. [阐明]

No streetlights illuminated the street.

一盏照亮街道的路灯也没有。

The streets were illuminated with strings of coloured lights.

一串串彩灯照亮了街道。

Instead of formulas and charts, the two instructors use games and drawings to illuminate their subject.

这两位教师用游戏和图画而不是公式和图表来阐明他们的题旨。

One chapter illuminates the colonial era, eight the nineteenth century, and four the twentieth century.

一章内容介绍殖民时代，八章内容介绍十九世纪，四章内容介绍二十世纪。

And I thought perhaps you could illuminate me.

我想或许您可以指点我一下。