1731, from Medieval Latin rotarius "pertaining to wheels," from Latin rota "a wheel, a potter's wheel; wheel for torture," from PIE root *ret- "to run, to turn, to roll" (cognates: Sanskrit rathah "car, chariot;" Avestan ratho; Lithuanian ratas "wheel," ritu "I roll;" Old High German rad, German Rad, Dutch rad, Old Frisian reth, Old Saxon rath, Old Irish roth, Welsh rhod "carriage wheel"). The international service club (founded by Paul P. Harris in Chicago in 1905) so called from the practice of clubs entertaining in rotation. Hence Rotarian (1911).
实用例句
1. A rotary telephone has a wheel with holes for each number.
转盘式电话有个带眼的轮子.
来自《简明英汉词典》
2. Invented in 1951, the rotary engine is a revolutionary concept in internal combustion.
1951年发明的转缸式发动机是内燃机领域内的革命性概念。
来自柯林斯例句
3. The central unit is a rotary drum.
核心设备是一个旋转的滚筒.
来自辞典例句
4. A control system for a new diesel rotary distributor pump is here introduced.
这里介绍一种新型柴油机回转式分配泵的控制系统.
来自辞典例句
5. The Lead Pump is usually of the simple rotary design which requires little attention.