I had known two great social systems.

那以前，他就经历过两大社会制度。

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Many observers, in the United States, in China and elsewhere, have wondered what some ask aloud: Can two countries with such different social and economic systems continue to cooperate?

在美国、中国和其他地方，许多观察家在考虑有些人大声提出的问题：社会和经济制度如此不同的两个国家能否继续合作？

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Shang and Western Zhou bronzes realistic animal decoration, reflects the Shang and Western Zhou Dynasty of two different religious beliefs and social systems between.

商、西周青铜器上的写实动物纹饰，体现了商、西周两个王朝不同的宗教信仰和社会制度之间的关系。

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The passion for learning about social and environmental issues in other cultures and educating youth led me to teach high school Environmental Systems for two years at Colegio Americano in Quito, Ecuador.

WHITEHOUSE: Serving the United States Through AmeriCorps