生物学
肾孔，肾口
肾内口
肾孔
肾口
肾卮
These kidneys have turned out to contain structures called nephrostomes tiny funnel-shaped ducts that are typical of aquatic vertebrates, but unknown in other mammalian embryos.
ECONOMIST: The elephant and the mermaid
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。