The interiorplains were fertile and suitable for new development.
内陆平原肥沃，适合新的发展。
2
Few of tropical Africa's rivers are navigable from the ocean, dropping as they do from interior tableland to coastal plains by a series of falls and rapids.
酷热的非洲，几乎没有适于航海的河流，这些河流从内陆高原到海岸平原一路穿瀑布、过险滩，倾流而下。
3
Its members belong to what is thought to be the oldest surviving culture in the Andes, a tribe that has survived for 4, 000 years on the barren plains of the Bolivian interior.