单词	pollen sac
释义	pollen sac noun : one of the pouches of a seed plant anther in which pollen is formed Word History First Known Use 1872, in the meaning defined above
随便看	unit marker unit membrane unit modifier unit of account unit of assessment unit of fire unit of value unit operation unit organ unit price unit prices unit pricing unit process unit pulse unit rule unit solid angle unit switch unit train unit trust unit value unit vector unit vote unit watermark unit-set unitable

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。