他们发现棕色的外壳由大量的沟状结构组成，它们能把太阳光转换成散射光线。
They found that the brown shell is made of an array of grooves that split sunlight into diverging beams.
这里有个例子，一种牡蛎状双壳贝，进化出越来越趋螺旋状的外壳，直到该物种灭绝前，其外壳已经几乎打不开了。
There is a case of an oysterlike bivalve that evolved a more and more spiraled shell until, just before extinction, the valves could barely open.
博物馆依然在建，但已经给人留下深刻的印象：混凝土和玻璃构筑的冲天状结构，包裹着木质结构，其外壳好似一艘朝天空方向航行的大船。
Even under construction, the museum is impressive: a soaring structure of concrete and glass, wrapped around a large wooden form like the hull of an upturned ship.
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