The layered implementation, however, presents problems such as code complexity, data accumulation, and difficulty of debugging.

但是，层状的执行会出现诸如代码复杂性、数据积累以及调试困难之类的各种问题。

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That is, a sequence a with 10 lines of code might have a very different degree of complexity and difficulty compared to sequence B of 10 lines of code written in the same language.

也就是说，用同一种语言编写的序列a和B都有10行代码，但是它们的复杂程度和困难程度可能根本无法相提并论。

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CBRN weapons have been little used so far, largely due to the difficulty of obtaining the materials and the complexity of using them effectively.

CBRN武器当前很少使用，主要是因为材料获取困难且有效使用复杂。

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Representatives of large, sophisticated companies that have been actively working to implement the expected requirements spoke eloquently at an October 2011 SEC Roundtable discussion of the complexity of their supply chains and the difficulty in obtaining solid information from their upstream suppliers on the origins of common, commodity metals like tin, tantalum, tungsten and gold in purchased products and components.

FORBES: Conflict Minerals Rule Imposes Big Burdens On Manufacturers

In the past it was only multinational companies that could afford to compete with global supply chains, not just because of the cost and complexity of operating trucks, aircraft and warehouses on different continents but also because of the difficulty of managing all these diverse elements.

ECONOMIST: Delivery companies are consolidating