实体语法系统是一种形式化语法系统，可用于形式化地描述复杂系统的组成单位、组织方式、变化规律。
Entity grammar system is a kind of formalized grammar system, which can be used to describe the component parts, organization patterns and transformation rules of complex systems in a formal way.
海豚没有声带，但却能发声：一个由口哨声、吱吱声、呻吟声、颤音和咔嚓声组成的复杂系统是由喷水孔内的括约肌产生的。
Dolphins lack vocal cords, nevertheless creating sounds: a complicated system of whistles, squeaks, moans, trills, and clicks are produced by sphincter muscles inside the blowhole.
人类由非常复杂的进化系统组成。
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