相反，它们之所以是黑暗的，是因为星际尘埃将恒星隐藏在它的后面。
Rather, they are dark because of interstellar dust that hides the stars behind it.
由于所有子元素都是局部的，所以它额外的优势是能够隐藏名称空间。
Because all subelements are localized, it comes with the added benefit of being able to hide namespaces.
因为dao无法通过接口或抽象类隐藏注入细节，所以任何更改都可能影响它的依赖组件。
Because dao is unable to hide implantation details through interfaces or abstract classes, any changes could then impact on its dependent components.
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