单词	reciprocation
释义	re·cip·ro·ca·tion (rĭ-sĭp′rə-kāshən) n. 1. An alternating back-and-forth movement. 2. The act or fact of reciprocating; interchange.
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英语词典包含135693条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。