单词	exochorion
释义	exochorion noun exo·​chorion ¦ek(ˌ)sō+ plural exochoria : the outer of the two layers that form the hardened covering of an insect egg Word History Etymology New Latin, from exo- + chorion
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英语词典包含469781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。