1. There are huge mountains covered with large forests, and wide, irrigable plains with navigable rivers.
巨大的山脉都覆盖着森林, 广阔 、 可灌溉的平原带有适于航行的河流.
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用作形容词 (adj.)
Its ultimate aim is to provide year round irrigation facilities and increase the irrigable area of the country to higher limits. 最终目标是更大限度的提供每年的灌溉设施和增加可灌溉的乡村面积。