When we use a font in a big size (for example in a poster), we enlarge everything.
当我们用大尺寸使用一个字体的时候(比如说用于海报)，我们会吧所有的部分都放大。
Mozilla Firefox allows users to enlarge or shrink font size or return to the original size.
Mozilla Firefox允许用户放大和缩小字体大小或返回到原始大小。
That is because with most devices you can enlarge the font size to as large as you like, which will help people with failing eyesight.
这是因为大多数的阅读设备都可以增大字体字号从而适应自己的需要，从而方便了那些视力不好人。
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