Nouakchott is the capital of Mauritania, and it's also the largest city.努瓦克肖特是毛里塔尼亚的首都, 同时也是其最大的城市.Mauritania becomes independent of France.1960年,毛利塔尼亚脱离法国独立.He will also visit Libya and Mauritania.他还将访问利比亚和毛利塔尼亚....
Categorize the plants into four groups.把这些植物分成4类。Her work is difficult to categorize.她的工作很难归类。This type of china is rather hard to categorize,it's very unusual.这种瓷器非常特殊，很难归类...