元素有着清晰定义的边界。

The element has a clearly defined boundary.

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borderedge包括了应用到某元素的边界。

The border edge includes the border applied to the element.

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此外，还可包括第三方工具和电子边界之类的元素。

In addition, you include elements such as third-party tools and an electronic perimeter.

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此外，还可包括第三方工具和电子边界之类的元素。

In addition, you include elements such as third-party tools and an electronic perimeter.

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