The American economic system is organized around a basically private-enterprise, market-oriented economy in which consumers largely determine what shall be produced by spending their money in the marketplace for those goods and services that they want most. Private businessmen, striving to make profits, produce these goods and services in competition with other businessmen; and the profit motive, operating under competitive pressures, largely determines how these goods and services are produced. (47)Thus, in the American economic system it is the demand of individual consumers, coupled with the desire of businessmen to maximize profits and the desire of individuals to maximize their incomes that together determine what shall be produced and how resources are used to produce it.
(48)An important factor in a market-oriented economy is the mechanism by which consumer demands can be expressed and responded to by producers. In the American economy, this mechanism is provided by a price system, a process in which prices rise and fall in response to relative demands of consumers and supplies offered by seller-producers. If the product is in short supply relative to the demand, the price will be bid up and some consumers will be eliminated from the market. (49)If, on the other hand, producing more of a commodity results in reducing its cost, this will tend to increase the supply offered by seller-producers, which in turn will lower the price and permit more consumers to buy the product. Thus, price is the regulating mechanism in the American economic system.
The important factor in a private-enterprise economy is that individuals are allowed to own productive resources (private property), and they are permitted to hire labor, gain control over natural resources, and produce goods and services for sale at a profit. (50)In the American economy, the concept of private property embraces not only the ownership of productive resources but also certain rights, including the right to determine the price of a product or to make a free contract with another private individual.
参考答案：[译文] 在美国经济中，私有财产这一概念不仅包含生产资料的所有权，还包含某些权力，比如产品价格的决定权，以及和其他个人自由签订合同的权利。
解析： 本句的主干为the concept embraces not only...but also...，其中but also certain rights 后面的部分including the right to determine the price of a product or to make a free contract with another private individual修饰certain rights，补充说明其范围。
[词汇] embrace(作为及物动词有拥抱，包含，包括等意思，这里取后者)productive resources(生产性资源，即生产资料)ownership(所有权)
| 可接受的翻译 | 不可接受的翻译 |
| the concept of private property embraces：私有财产这一概念不仅包含 | the concept of private property embraces：私有财产这一概念不仅拥抱 |
| make a free contract：自由签订合同 | make a free contract：免费签订合同 |
例1：在美国经济中，私有财产这一概念不仅包含生产资料的所有权，还包含某些权利，比如产品价格的决定权，以及和其他个人自由签订合同的权利。
例2：在美国经济中，私有财产的概念包含不仅有生产资料的所有权，还有确定的权利，比如决定产品价格的权利，以及和其他个人自由签订合同的权利。
例3：在美国经济中，个人财产的概念不仅拥抱生产资源的所有权，还拥抱确定的权利，包括决定产品价格的权利，或者和其他个人自由签订合同。
例4：在关国经济中，个人财产的概念不仅拥抱生产资源的所有权，还拥抱确定的权利，包括决定产品价格的权利，或者和其他个人免费签订合同。
例5：在美国经济，个人财产的概念拥抱不仅生产资源所有权，而且确定的正确，包括决定产品价格的正确，或者和其他个人免费联系。