The Treens are fictional aliens in the Dan Dare stories. They first appeared in Dan Dare: The First Story, which was serialized in the Eagle comic magazine from Volume 1, Number 1 (April 14, 1950) to Volume 2, Number 25 (September 28, 1951).
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。