其它的开放系统，例如邮政、道路或者是电话都承担了一个超越它们本身简单技术特征的社会服务功能。
Other open systems such as the mails, the roads or the telephones come to perform a function in society that transcends their simple technical characteristics.
土地报酬存在于受社会科学技术进步影响的农业生产这个开放系统中。
The returns of land exist in the open system of agricultural production which is closely related to the progress of science and technology achieved in a society.
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