Your cardiovascular system is an important and fragile group of structures that pumps nutrient - and oxygen-rich blood throughout your body.

你的心血管系统是一组重要而脆弱的结构，它输送你身体富含营养和氧气的血液。

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"They don't quite trust the Israeli political system or the police or all the structures of authority and so a very tiny group has declared a war on the entire Israeli mainstream,".

VOA: standard.2009.11.14

Moreover, a number of countries permit intra-group structures generating large local deductions for interest and royalties, thereby significantly lowering the tax costs of business operations in their countries.

FORBES: U.S. Corporations Act Responsibly in Reducing Foreign Taxes

Designed by ROMA Design Group, of San Francisco, the playground will have climbing structures, swings and other play equipment for children ages 2 to 12, and it will be surrounded by bushes and other landscaping, along with a fence.

WSJ: Playground Plan Shows Philanthropy's Swing Toward Home

Since the electrical properties of solids depend on their crystal structures, his group is experimenting with new atomic lattices.

ECONOMIST: Thermoelectrics