These beams, known as la foret (the forest) because of their density, formed the cross-shaped roof that ran the length of the central part of the cathedral.
这些因其密度而被著称为 la foret（森林）的梁，组成了横跨大教堂中心部分的十字形屋顶。
2
The most common mineral identification plot is a neutron-densitycross plot.
最常见的矿物识别交会图是中子-密度交会图。
3
With increase of heat input and laser power density, the cross section of the weld transformed from nail shape to near X shape.