Meanwhile, we should attach importance to the influence and role of the informal system environment.

同时，要重视非正式制度环境的影响和作用。

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Figure 3: an informal system drawing without well-defined modeling notation can quickly become incoherent.

图3：没有用定义明确的建模符号绘制的非正式的系统会很快松散起来。

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Social capital has the attribute of informal system, but also has the attribute of organization at the same time.

社会资本既具有非正式制度的属性，同时也具有组织的属性，它能够给处于其中的人带来收益。

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The current informal system of allocating air time and scheduling broadcasts seems badly in need of an overhaul.

ECONOMIST: Party election broadcasts

He points out that, with the exception of an informal system in California, no country in the world has yet set up regular probabilistic earthquake forecasting that can be used to guide emergency actions.

ECONOMIST: An extraordinary manslaughter trial starts in Italy

He did it through what he says was the only means available to transfer funds to war-torn Iraq, an ancient informal system known as hawala, in which brokers move money outside the conventional banking system.

NPR: Town Backs Kurds Who Sent Money Back to Iraq