运货马车的马

例句：

1. 1. The mule is used for pulling heavy loads on farms.
   骡子用于农场拉重物。
2. 2. The farmer rode his mule to the market every morning.
   农民每天早晨骑着他的骡子去市场。
3. 3. The mule was a valuable asset to the caravan's journey.
   骡子是商队旅程中宝贵的资产。