在上述场景中，出现了很多常见错误，这些错误本可以轻易避免。
In the previous scenarios, common mistakes were made that could have been avoided easily.
在上述场景中，动画可由相应的用户交互动作来终止。
In the discussed scenario, the running animation could be aborted by a corresponding user interaction.
本文将介绍如何构建一个自定义小部件，可在上述第二种场景中轻松使用这些更新数据源。
This article describes how you can build a custom widget that makes it easy to use these relational update feeds for the second type of scenario listed above.
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