单词	roller chain
释义	roller chain noun : a block chain in which hollow transverse blocks or cylinders turning on steel pins act as rollers to lessen friction Word History First Known Use 1841, in the meaning defined above
随便看	eared seal earflap earflaps earflower earful earfuls Earhart earhead earhole earing earings earjewel earl Earl Grey earl marischal earl marischals earl marshal Earl Marshal's court Earl of Coventry earl palatine earlandite earlap earlaps earldom earldoms

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。