donkey是什么意思？

Mules have strong muscles like horses; but they eat less, can work longer, and are gentler, like donkeys.

Do you know where a mule comes from? It is the child of a donkey and a horse.

But people still mostly fed carrots to horses, donkeys and pigs, and didn’t eat them themselves.

Technology has cut out much of life's donkey work, and we have more freedoms than ever: we can wear what we like and communicate with hundreds of friends at once at the click of a mouse.