When you use – in your document, it's replaced by Unicode character U+2013, the en dash (-) character.
我们在文档中使用 – 时，它由 Unicode 字符 U+2013（短横线 - 字符）替代。
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What 's more, we are the first nation to be founded for the sake of an idea – the idea that each of us deserves the chance to shape our own destiny.