英语词汇parsec的发音释义、词根词缀、结构分析、同源词、词频及词根记忆法-英语词根词缀词典

词汇	parsec
词根词缀	词源： 1913, from par(allax) sec(ond). It is the distance at which an object has parallax (viewed from Earth) of one second of arc, or about 3.26 light years.
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