Events in any real world are both complex and uncertain.

任何现实社会里的事件都复杂多变。

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In order to get the better useful information from the exam data, which with complex and uncertain data, it is necessary to preprocess the source data.

为了更好地从大量复杂的和不确定的考试数据中有效地挖掘有用的信息，必须对源数据进行预处理。

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A model of risk assessment and management was constructed to quantify the complex and uncertain interactive relationships between different risk factors.

为了量化风险因素间的复杂的、不确定的关系，建立一个模糊模型来进行风险评估。

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It is also the only major country that continues to maintain a health-care system with substantial elements of competitive supply, pricing freedom, patient choice, and diversity in approaching complex and uncertain medical problems.

WSJ: Christopher DeMuth: A Referendum on ObamaCare and Liberty

Some of these dynamic circumstances include: changes in wealth, later-life marriages and remarriages, the recent flood of increasingly complex (and uncertain) tax laws and the growing popularity and usefulness of lifetime irrevocable trusts.

FORBES: "Fixing" the Broken Estate Plan

Nonprofits do this work regularly, and in a volatile, uncertain, complex and ambiguous world.

FORBES: To Transform the U.S. Education System, Focus on Teacher Effectiveness