SEAndroid (a modification of SELinux for Android) is decently described here: https://lineageos.org/engineering/HowTo-SELinux/
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事实上，浮潜看似门槛低、操作简单，却暗藏多重风险，呼吸方式的骤然转换易引发呛水恐慌，隐蔽的离岸流可能瞬间将人卷离岸边，老化或不合规的装备更会直接放大危险，使其成为水上项目中死亡事故的主要诱因。，推荐阅读电影获取更多信息
As a result, the order in which things are declared in a program can have possibly surprising effects on things like declaration emit.，详情可参考PDF资料