The increase in property value resulting from factors independent of the owner, such as a general rise in demand for land, as opposed to increase of value earned directly by the efforts of the owner.不劳而获的增值:财产数值的增加,由与所有者无关的因素引起,例如对土地需求的普遍提高,这与直接通过所有者的努力挣得的价值增加相反