由放射性钠衰变产生正电子，冷却后形成一个由大约100万个正电子组成的体积同样大小的粒子云团，这团正电子被存放在相邻的一个容器中。
The positrons, produced by the decay of radioactive sodium, are cooled into a similarly sized cloud of around 1m particles and held in a neighbouring trap.
这些所有形成外立面的材料是由回收的砖块组成，位于侧面的内部螺旋形的走廊是由混凝土定制设计而成。
Materials consist of both recycled traditional bricks, which form the exterior facade, and custom designed concrete screen blocks, which flank the interior spiral passageway.
沉积岩不像火成那样是由熔融的岩石物质形成，沉积岩是由早先存在的浆岩、变质岩和沉积岩的矿物碎屑及岩石屑组成的。
Unlike igneous rocks which are formed from molten rock material, sedimentary rocks are made up of particles of previously existing rocks, including igneous, metamorphic and sedimentary rocks.
这些所有形成外立面的材料是由回收的砖块组成，位于侧面的内部螺旋形的走廊是由混凝土定制设计而成。
Materials consist of both recycled traditional bricks, which form the exterior fa? Ade, and custom designed concrete screen blocks, which flank the interior spiral passageway.
展馆结构由缓坡形成，呼应了德国乡村自然的地貌特征。展馆由露天入口与室内展区组成。
The structure consists of a gently sloping landscape, recalling the natural slopes of the German countryside, an open access area, and inside, a themed exhibition.
展馆结构由缓坡形成，呼应了德国乡村自然的地貌特征。展馆由露天入口与室内展区组成。
The structure consists of a gently sloping landscape, recalling the natural slopes of the German countryside, an open access area, and inside, a themed exhibition.
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