沙粒形状的不规则性使得沙粒的质心存在着偏心距，且沙粒所处位置的不同使其偏心角各异。
The shape irregularity of sand grains leads to eccentric distances in grains, and their variant positions when they begin to move results in the diversity of eccentric angle.
锥形套圈由于它截面形状的不规则性决定了辗扩过程金属变形的不均匀性，这是导致不规则宽展、拉凹的主要原因。
The taper ring's irregular section shape decide the unequal forming of the ring metal when rolling ring, which is the main cause of irregular wide spread and draw concave on the symmetry face of ring.
由于鞋楦形状具有不规则性，采用常规的鞋楦设计方法进行设计工作量大，重复性高，效率低下。
Because of shoe last's irregular shape, designing the shoe last with conventional method will be a heavy, high repetitive and inefficient work.
由于鞋楦形状具有不规则性，采用常规的鞋楦设计方法进行设计工作量大，重复性高，效率低下。
Because of shoe last's irregular shape, designing the shoe last with conventional method will be a heavy, high repetitive and inefficient work.
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