Arabian camels, also called dromedaries, have been domesticated for some 3,500 years. valued as pack animals, they can carry large loads for up to 25 miles (40 kilometers) a day.

• 阿拉伯骆驼也称为单峰骆驼，已经有着大约3,500年的驯养史。骆驼队可以携带大批货物每天行进25英里(40公里)。