My purpose is to help us understand what has happened in America, hoping that we may learn from the past, benefiting from both the good and bad examples we find in American history.

我的目的是帮助我们了解美国的历史，希望由历史中学习，从好的与不好的事例中获得益处。

youdao

We should set rules about technology use, make sure kids are clear about how their online actions might affect themselves or others, set good examples for them, and even let them make and learn from their mistakes.

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