名词

1. Don't be a young mule.
年纪轻轻，别那么固执。

1. 骡;骡子
A mule is an animal whose parents are a horse and a donkey.

2. 拖鞋式便鞋;拖鞋
A mule is a shoe or slipper which is open around the heel.

noun

1. hybrid offspring of a male donkey and a female horse
usually sterile

2. a slipper that has no fitting around the heel

Synonym: scuff