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单词	balance board
释义	balance board noun : a board that is mounted on a rounded fulcrum and used for various exercises and feats of balance … up to 30 students at a time are performing yoga stances in unison, stretching, shadow boxing and running in place, all on special balance boards. Bob Fowler, Knoxville (Tennessee) News-Sentinel, 3 June 2010 Word History First Known Use 1966, in the meaning defined above
随便看	rift valley Rift Valley fever rift valleys rift-sawed rift-sawn rifted rifter rifting riftless rifts rig rig (out) rig (up) rig irons rig out rig the ballot rig up Rig Veda rig's disease rig-and-fur rig-out petering petering (out) petering out peterman

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。