The ancient mountains of Appalachia are corrugated with deep, narrow valleys, some of them no wider than a football field. 阿帕拉契的古老山脉被又深又窄的山谷切割得高低起伏，有些山谷还不比一个足球场宽。
appalachia英英释义
Noun:
an impoverished coal mining area in the Appalachian Mountains (from Pennsylvania to North Carolina)
