Found in all the oceans of the world, including the Arctic Ocean, appendicularians tend to remain near the water's surface where the density of phytoplankton is greatest.
在世界上所有的海洋，包括北冰洋，尾海鞘都是出没在浮游植物密度最大的水域表面。
Staining of a thin sliver of each block can highlight the main bodies of nerve cells (top, purplish image) with the darker areas indicating high cell density near the brain's surface.
对每一块的细微纹路进行着色能突显出神经细胞的主体部分(上面略带紫色的图)。图中的偏暗区域代表了大脑表明的高细胞密度区域。
The density of crystal defects in the region near the crystal surface is greater than that in the center.
晶体的靠近表面的区域缺陷较密集，中心部分较少。
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