这种分区方法的主要缺点是缺乏很好的灵活性，不能对资源做出有效调配。

The main drawback of this method is the lack of good flexibility, can not make effective allocation of resources.

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普渡大学的艾伯特•赫贝(Albert Heber)也在试验减少臭味的方法-例如，通过调配动物饲料，或进行生物过滤。

Albert Heber, of Purdue, is also looking into ways to lessen the stink-by modifying animal diets, for example, or by biofiltration.

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科学家拟定的“电子图纸”详细说明了食物原料的调配方法，该图纸是用传统工程学中的计算机辅助设计(CAD)软件绘制而成的。

An electronic blueprint states exactly what materials go where and are drawn up using traditional engineering computer-aided design (CAD) software.

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