名詞 mule:

1. hybrid offspring of a male donkey and a female horse; usually sterile
2. a slipper that has no fitting around the heel
   同義詞：scuff

1. A mule is a cross between a horse and an ass.
   騾是馬和驢交配而生的雜種。
2. He is as stubborn as a mule.
   他非常固執(zhí)。
3. A mule is a hybrid of a male donkey and a female horse.
   騾子是公驢和母馬交配而生的雜種動(dòng)物。
4. A mule is a hybrid of a donkey and a horse.
   騾子是公驢和母馬交配而生的雜種。
5. Mules are a cross between a horse and an ass.
   騾子是馬和驢的雜種。

mule

n.（名詞）
The sterile hybrid offspring of a male donkey and a female horse, characterized by long ears and a short mane.
騾：公驢和母馬雜交的無繁殖能力的后代，特征是鬃毛短、耳朵長(zhǎng)
A sterile hybrid, as between a canary and other birds or between certain plants.
雜交種動(dòng)物（植物）：雜交不育的品種，如在金絲鳥和其他鳥類之間雜交出的不育品種，也可指在植物之間
Informal A stubborn person.
【非正式用語】 犟驢：一個(gè)頑固的人
A spinning machine that makes thread or yarn from fibers.
走錠精紡機(jī)：能從纖維中捻出線或拔出絲的機(jī)器
A small, usually electric tractor or locomotive used for hauling over short distances.
輕型拖拉機(jī)，輕型牽引機(jī)：適用于短途搬運(yùn)的小型、電動(dòng)拖拉機(jī)或牽引機(jī)
Slang A person who serves as a courier of illegal drugs.
【俚語】 走私或販運(yùn)非法麻醉品的人

來源：
Middle English
中古英語
from Old French mul
源自 古法語 mul
and from Old English môl
并源自 古英語 môl
both from Latin môlus
都源自 拉丁語 môlus

mule
mule 2

n.（名詞）
A slipper that has no counter or strap to fit around the heel.
拖鞋：腳跟處沒有后幫或扳扣的拖鞋

來源：
Probably French [slipper]
可能為 法語 [拖鞋]
possibly from Middle Dutch muil
可能源自 中古荷蘭語 muil
ultimately from Latin mulleus (calceus) [reddish-purple (ceremonial shoe)]
最終源自 拉丁語 mulleus (calceus) [淡紅紫色（禮儀鞋）]