But I will tell my officers to let all the men who claim to own a horse or mule take the animals home with them to work their little farms."

VOA: special.2009.12.24

A mule is not spending 1/2 of its time as a donkey, and 1/2 of its time as a horse, we don't see it flickering back and forth between the two, that's not what we see.

骡子并不是一半的时间是驴，另一半的时间是马，我们不会看到它在两者之间来回变化，这不是我们所看到的情况。

麻省理工公开课 - 化学原理课程节选

And then furthermore "ship" is also the opposite of certain things, so that it would also enter into a relationship with "train," "car," "truck," "mule," modes of transportation, right?

而且，根据，船，这个词，我们还能衍生出其他集合,像是，火车，汽车，卡车，驴，等等交通工具，对吗？

耶鲁公开课 - 文学理论导论课程节选

Mule stables dotted the route. But the canal company ran out of money as faster railroads stole most of their business, and the C&O Canal never reached Pittsburgh and the Ohio River.

VOA: standard.2010.04.29