Productivity is one of the design features of human language which enables language users to understand and interpret new signals, so that they can produce and understand an infinitely large number of sentences, including sentences they have never heard before. Productivity is unique to human being. No animal communication system has such a defining property.
多产性是人类语言的甄别性特征之一，它使语言使用者能够理解和解释新的信号，从而产生和理解大量的句子，包括他们从未听说过的句子。多产性是人类特有的。没有一个动物通讯系统具有如此典型的特征。
