在更加简单的例子中，需要识别校正行为，这些行为能够通过事后处理结果得出的目标数据被解决。
In more simple cases, a need is identified for corrective actions that can be solved simply by post-processing the resulting target data.
但是不用担心，使用一个简单的只有 iPhone 才能识别的 meta 标记，就可以将网页校正到 “正确的尺寸” 了：viewport 标记允许为移动 Safari 浏览器添加提示。
Never fear, though. With a simple meta tag that only the iPhone pays attention to, you can "right-size" the Web page: A viewport tag allows you to supply hints to the mobile Safari browser.
简单地说，陀飞轮就是为了校正重力对精度的影响。
Tourbillons (in the most basic terms) prevent gravity from adversely affecting accuracy.
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