mule

mule1
noun
  1. the offspring of a donkey and a horse (strictly, a male donkey and a female horse), typically sterile and used as a beast of burden
    骡，马骡。 比较hinny
    ■a person compared to a mule, especially in being stupid or obstinate
    笨蛋；顽固的人
    ■(informal)a courier for illegal drugs
    (非正式)毒品送货人
    ■a small tractor or locomotive, typically one that is electrically powered
    （尤指电动的）小型拖拉机；小型电动机车
  2. a hybrid plant or animal, especially a sterile one
    （尤指不育的）杂交动物；杂交植物
    ■any of several standard cross-bred varieties of sheep
    杂种羊
  3. (亦作 spinning mule)a kind of spinning machine producing yarn on spindles, invented by Samuel Crompton in 1779
    (1779年由塞缪尔•克朗普顿发明的）走锭纺纱机
  4. a coin with the obverse and reverse of designs not originally intended to be used together
    （正、反两面的图案不相配的）错铸硬币
语源
  1. Old English mūl, probably of Germanic origin, from Latin mulus, mula; reinforced in Middle English by Old French mule
mule2
noun
  1. a slipper or light shoe without a back
    拖鞋；拖鞋式轻便鞋
语源
  1. mid 16th cent.: from French, slipper'
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