... 2、Preferences优先设置 Display caching位图设置 Keep view on window resize当调整查看窗口时，系统维持在窗口中的屏幕比例 ...
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As explained in the earlier section, you need to turn off caching to get your updated city choices to display.
如同在早先章节中所说明的，您需要关闭缓存以显示更新的城市选择。
If you are getting data that updates often, such as the data in the blogs sample application, caching is not ideal because it does not display the most up-to-date user data.
如果获取的数据经常更新，如博客应用程序示例中的数据，就没必要用缓存，因为它不会显示最新的用户数据。
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