An active element; a word, phrase, or symbol.
有效元件；一句话，短语或者符号。
Vocabulary is a dynamic and open system, and the most active element in language.
语言中的词汇是一个动态的开放性系统，是语言中最活跃的因素。
Euro is an active element affecting the economic growth in Europe.
欧元对欧洲经济增长是一个积极因素。
Euro is an active element affecting the economic growth in Europe.
欧元对欧洲经济增长是一个积极因素。
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