Human language is productive, an open-ended communication system, whereas no other communication system has this property.
人类的语言是多产的，是一个开放的交流系统，而其他交流系统都没有这种特性。
This ecosystem is one of the fascinating paradoxes of the biosphere: how do clear, and thus nutrient-poor, waters support such prolific and productive communities?
这个生态系统是生物圈中令人着迷的悖论之一：清澈而又缺乏营养的水域是如何支撑如此多产的群落的？
The workshop of the Haimon Painter was especially productive.
海蒙画家的工作室特别多产。
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