This same structure creates the building's most important element, an element that has no physical aspect and takes up no volume or space - the layer of shadow.

相同结构创造了该建筑最重要的元素——影子层，它没有物理外观，不占体积和空间。

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While it helps to use tone as shadow, you don't need to know advanced lighting techniques to add this aspect to your drawings.

虽然用色调作阴影很有效，但你大可不必用高超的灯光技巧来为这些图画蛇添足。

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Shadow Home Office minister Diana Johnson said one aspect of the committee's report that raised eyebrows covered youngsters holding firearms certificates.

BBC: Debate on firearms control

Another galling aspect of the defeat was the fact Scotland were essentially facing a shadow Welsh side.

BBC: Storm clouds gather over Scots