The iPhone has a much-denser pixel arrangement than a normal desktop screen, meaning that fonts and images appear smaller on the actual phone than on a simulated screen.
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恶意代码可以隐藏在字体中，当用户打开PD F文档时自动加载，从而允许黑客完全控制手机。
Malicious code can be hidden in fonts that automatically load when a user opens a PDF file, allowing a hacker to take control of the device.
Under the new rules, stores will be required to show the Specific Absorption Rate (SAR) of radiation next to phones they sell with a clearly readable 11-point or larger font.
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