目的：对阿佛曼链霉菌采用新的诱变手段，以获得稳定高产的优良菌株。

Objective:In order to obtain a stable high-yielding good strains, The new mutagenesis means is used on Streptomyces avermitilis.

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企业生产经营的目的之一是追求利益最大化，降低成本是其主要方法，而供应链管理则是降低成本的核心手段。

The business goal of an enterprise is to pursue maximum benefit. Cost cutting is one of the ways to achieve that goal, and supply chain management is the core means of cost cutting.

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