单语范例（未经PONS编辑处理）
Men with pickaxes and mules and wagons had long been the means of locating and moving the coal to the surface.
en.wikipedia.org Any equine of any size may compete in agility, including miniature horses, donkeys, mules and draft horses.
en.wikipedia.org The pack loadable version could be broken down into eight mule loads or towed by a four horse team, with a further six mules to carry ammunition and other supplies.
en.wikipedia.org But the numeration of a citizen's mules, implements, furnishings and like property was the true measure of real wealth.
www.rejournals.com Like other inter-species hybrids, mules and hinnies are usually sterile.
en.wikipedia.org