| 词汇 | rotor |
| 词根词缀 | 词源： 1873, irregular shortening of rotator, originally in mathematics. Mechanical sense is attested from 1903; specifically of helicopters from 1930. Rototiller (with tiller) is a proprietary name in U.S., attested from 1923. 词根记忆： n. 旋转体(rot+or)[rot=wheel,表示"轮子,转"] 词根词缀： rotor rotor n 旋转体(not+or) rot= wheel, 表示”轮子,转” rotate v 旋转(rot+ate) rotatory a 旋转的,轮流的(rotate+ory) rotor n 旋转体(not+or) rotund a 圆形的,圆胖的(rot 转=圆+und=圆的,胖的) rotundity n 圆形,圆胖(rotund+ity) |
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