BOM's are characterized by the number of levels involved, following the structure of assemblies and sub assemblies.

BOM是由相关的各级编号组成，遵循总装和组装的结构。

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Subsequent iterations further the building of sub-assemblies in reality or through models, depending upon the number of standard elements.

后面的迭代更加促进了构建子系统集成，是实际系统或模型则依赖于标准单元的个数。

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A cumbersome system of open assemblies, committees, sub-committees and working groups means the process of producing a coherent set of demands is proving painfully slow.

一个由议会，委员会，小组委员会和工作组组成的笨重系统意味着制定出一系列连贯完整诉求的进程注定是令人痛苦的冗长。

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If distributed manufacturing and snap-together assembly were really such bad ideas, its American rival Boeing would not have recently adopted the same approach, flying in sub-assemblies to its Seattle base from as far away as Japan and Italy.

ECONOMIST: Airbus