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The prevention of a conjunction of two planets by the retrogression of one of them.
Late 16th century. Apparently a variant of either refrenation or refraination.
雅致网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。