照片的主体是落满灰尘的三只支架之一，支架，能帮助飞船顺利着落岩石遍布，及其干燥的火星表面。
The photo shows one of three dust-covered footpads of the craft resting on Mars's dry, rock-littered surface.
这个建筑被认为是建在一个透明的有渗透性主体上的一个巨大而不透明的岩石体块。
The building is perceived as a large petrous and opaque volume placed over a transparent and permeable body.
滇西南造山带的主体由多期变质的岩石单元组成。
The main parts of SW Yunnan orogenic zones consist of complicated metamorphic rock units.
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