单词	roundsman
释义	roundsman noun rounds·​man ˈrau̇n(d)z-mən  1 : one that makes rounds 2 : a supervisory police officer of the grade of sergeant or just below Word History First Known Use 1795, in the meaning defined at sense 1
随便看	differential indexing differential locust differential motion differential operator differential piece-rate system differential psychology differential pulley differential rate differential refraction differential route differential screw differential thermometer differential threshold differential white count differential windlass differentially differentials differentiate differentiated differentiates differentiating differentiation differentiations differentiator differentiators

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。