这个悬臂结构只有一端固定；所谓分形，就是指能够分叉成多个部分的结构，每个子结构与母结构是大体近似的。
A cantilevered beam is anchored at only one end; a fractal is a shape that can be split into parts, each of which is a smaller, though sometimes not exact, copy of the larger structure.
弹头（在枪膛中）的前进过程中，铁制子弹（此处指底座上的铁质闭锁，也有使用软木制作闭锁的——译注）会膨胀，紧咬住螺旋形的膛线，使得射程和精准度都大大增加，同时减少子弹死火。
On its way, the iron bullet expanded, gripping the spiral rifling and spinning so tightly along its course that its range and accuracy were greatly increased, with fewer misfires.
梭形细胞黑色素瘤和指状突树突细胞肉瘤：它们代表相同的过程吗？
Spindle Cell Melanoma and Interdigitating Dendritic Cell Sarcoma: Do They Represent the Same Process?
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