第22行到第53行修改了该look and feel的UIDefaults，以便通过在外部资源文件中定义的一个缩放比例来放大标准图标。

Lines 22 through 53 modify the UIDefaults of the look and feel to magnify the standard ICONS by a factor defined in the external resource file.

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这个look and feel所使用的字体大小被设置为30(第5行)，图标被放大到初始大小的250%(第3行)，基本颜色则被设置为黑色和白色(第6行到第15行)。

The font size for this look and feel is set to 30 (line 5), the ICONS are scaled to 250 percent of their original size (line 3), and the basic colors are set to black and white (lines 6 through 15).

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第15课您可以免费得到一张放大的照片。

Lesson 15 You can get an enlargement free of charge.

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In the 1st part you can see is that we zoom in here to the very back of the brain.

第一部分中,大家看到的是我们放大了的大脑后面的部分。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选