Because a logical or physical model is an abstraction of the real-world system, it is usually very complicated, and it consists of many building blocks and relationships.

由于逻辑或物理模型是现实中的系统的抽象，它通常非常复杂，由很多构建块和关系组成。

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The facility is also a world-scale chemical plant, pumping out thousands of tons of polyethylene and polypropylene, the building blocks of plastic, and paraxylene, which gets turned into polyester.

这家工厂也是一座世界级规模的化工厂，将源源不断地生产成千上万吨聚乙烯、聚丙烯（塑料的基本组成部分）和二甲苯（PX，用于合成聚脂纤维）。

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These five elements act as the building blocks from which our material world and bodies are built.

这五种元素是构筑物质世界和身体的基础个体。

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Once they can manipulate atoms--which combine to form molecules, the building blocks of our natural world--scientists can create new building blocks that produce new materials with the exact properties they desire: smaller, stronger, tougher, lighter and more resilient than what has come before.

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Bell Labs created building blocks of the modern world--the transistor, Unix, laser breakthroughs, cellular telephony.

FORBES: Lucent's Labs

The experience is meant to replicate the feeling of being a kid and sitting in your room with a bunch of blocks, dolls and toys and building a world in your imagination.

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