例句:曼丁哥语尼日尔刚果语族中的一支,尼日尔河上游河谷地区的人说此语 A branch of the Niger-Congo language family, spoken in the upper Niger River valley.圆形山谷一种出现在山脉谷地上端的陡峭山谷,常有小湖泊 A steep hollow, often containing a small lake, occurring at the upper end of a mountain valley.山谷两边有山的谷地