请用英文分别分析一下six nature of human language：DisplacementArbitrarinessProductivityDualityDiscretenessCultural transmission

Displacement: This refers to the ability of human language to communicate about things that are not present in the immediate context. Unlike other forms of communication that are limited to the present moment, human language allows us to talk about past events, future plans, or even abstract concepts.

Arbitrariness: Human language is characterized by the arbitrary relationship between words or signs and their meanings. In other words, there is no inherent connection between a word and the object or concept it represents. This means that different languages can assign different words to represent the same object or concept.

Productivity: Human language is highly productive, meaning that speakers can create and understand an infinite number of sentences using a finite set of rules and vocabulary. This allows us to express new ideas and thoughts that have never been expressed before.

Duality: Human language has a dual structure, consisting of both meaningful units (such as words) and meaningless units (such as phonemes). This duality allows us to combine and recombine these units to create new words and sentences.

Discreteness: Human language is made up of discrete units, such as individual words or phonemes. These units can be combined in different ways to create meaning. This discrete nature allows for clear distinctions between different linguistic elements.

Cultural transmission: Human language is not innate, but rather acquired through cultural transmission. We learn language from our social environment, typically from our parents or caregivers, and it is passed down from generation to generation. This cultural aspect of language allows for the preservation and evolution of different languages and dialects.