| 单词 | θ18807 | 
| 释义 | the world > life > biology > biological processes > procreation or reproduction > embryo or fetus > membranes, etc., of embryo or fetus > 			[noun]		 (49)		 Subcategories:— 			placenta			(16)		 — 			membranes enclosing			(20)		 — 			amniotic fluid			(3)		 — 			umbilical cord			(8)		 — 			substances covering fetus			(2)		 | 
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英语词典包含1132095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。