1. 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。
2. Second, data can illuminate patterns of behavior we haven't yet noticed. 其次，数据可以阐明一些我们尚未注意到的行为模式。
3. Such explanations, however, illuminate neither the source of this curious convention nor the reason for its popularity. 然而，这样的解释既不能说明这个奇怪的惯例的来源，也不能说明它流行的原因。
4. Yet its report may well set back reform by obscuring the depth and breadth of the challenge that Congress asked it to illuminate. 然而它发布的报告很可能会阻碍改革的步伐，因为国会要求它阐明挑战的深度和广度，而这一点却并没有被阐述清楚。
5. The light source must therefore be immensely brighter if it is to be used as a headlight to illuminate the path, than if it is to be used as a signal to others. 与用作被人识别的信号相比，如果用作照亮路途的头灯的话，光源必须要明亮很多。
