The irregular border indicated that over a long period of time each skein of yarn had been bought and hoarded whenever a dollar or two was available.

从它不规则的边沿来判断，每一束纱线都是在她手头存够一两美元的时候才买来的，而且之间隔的时间较长。

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Fancy yarn with irregular shape, complicated texture and structure, and multicolor is difficult to model and simulate.

花式纱线不规则的外形、复杂的材质结构以及丰富的色彩变化，造成对其进行计算机模拟的困难。

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