The gastrotrichs (from Greek γαστ?ρ, gaster ["belly"], and θρ?ξ, thrix ["hair"]), often called hairy backs, are a phylum of microscopic (0.06-3.
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。