The shadow covers the visitor and throws him into a secondary temporal dimension: the view is not well-defined but the thoughts are clear, taking shape in the interior empty space between two blocks.

阴影覆盖着游客并把他们放在一个二维的暂时空间里，这种感觉是不明确的，但关于对两个体块之间的内部空间的感受却是明确的。

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It is characterized with well defined boundary, good shape, easy control of mesh density and high level of automation, and suit for polygons with any shape.

具有边界清晰、单元形状好、网格密度可控和自动程度高的特点，适合于任意形状的凹或凸多边形。

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Benign tumors were usually well-defined, and malignant ones ill-defined, irregular in shape, heterogenous in density with tissue necrosis.

恶性肿瘤边界不清，形态不规则，有大片坏死区；

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