Our aim is to simplify the complex social security system.

我们的目的是要简化复杂的社会保险体系。

《柯林斯英汉双解大词典》

A country as vast as China with so long-lasting a civilization has a complex social and visual history, within which pottery and porcelain play a major role.

中国这样幅员辽阔、文明源远流长的国家有着复杂的社会和视觉历史，其中陶瓷扮演着重要的角色。

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Humans are complex social animals.

人是复杂的社会动物。

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"We're proposing that health researchers get involved in projects like housing, like economic development, certainly educational projects, and study the health effects hopefully the health benefits of these complex social, economic interactions.

VOA: special.2009.07.20

Watching the chimps, she learned that they have very different personalities, with complex family and social relationships.

VOA: special.2009.11.18

India is unique in having such a complex social system to identify people in need.

WSJ: India Classifies More Castes as 'Backward' In Affirmative-Action Bid to Help the Poor

It bears witness to the complex social relations between Europeans and Africans, and to the subsequent independence movement.

UNESCO: Xanadu (China), Bassari Country (Senegal) and Grand Bassam (C?te d��Ivoire) added to UNESCO��s World Heritage List | United Nations Educational, Scientific and Cultural Organization

The government considers that this requirement is justified, taking into account the complex social and political issues raised.

BBC: Can Britain accept funeral pyres?