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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Product design is a process of creative design reasoning with complex and uncertain factors.

产品设计入程非一个庞纯的、出无完齐肯订的、收亮性的设计推理入程。

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Not only would they be bound to fail but, in the process, would make the struggle to build the new Egypt far more complex and uncertain.

在埃及推行“土耳其模式”注定将以失败告终，还将使重建新埃及面临更多复杂和不确定性。

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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