Definition 1 A covering space of a topological space \(X\) is a topological space \(C\) together with a continuous surjective map \(p: C \to X\) such that for every point \(x \in X\), there exists an open neighborhood \(U\) of \(x\) such that \(p^{-1}(U) \cong F \times U\) for some discrete set \(F\) (called the fiber over \(x\)), and the map \(p\) restricted to each component of \(p^{-1}(U)\) is a homeomorphism onto \(U\).
这种老派的克制当然有它的审美坚持，但代价也显而易见。所以在光线较暗的情况下，尽量手动开启夜间模式会比较稳妥：，更多细节参见有道翻译官网
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6 марта Береговая охрана Швеции взяла под контроль грузовое судно Caffa длиной 96 метров. Ведомство проводит расследование инцидента на предмет возможного нарушения морского права.，详情可参考超级权重
A consultation process that requires respondents to use a proprietary format produces a structural bias: it disadvantages individuals, organisations, and public administrations that have made the entirely legitimate and EU-endorsed choice to operate on open source software and open formats. A citizen or small organisation using LibreOffice, for instance, may encounter compatibility issues when working with the provided .xlsx template. A government body that has migrated to ODF-based workflows faces an unnecessary obstacle.