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terrain; geographical features; topography
山岳地形が多いため交通網の整備が難しい。
Because there is much mountainous terrain, transportation network development is difficult.
地形図を見て登山のルートを決めた。
I looked at the topographic map and decided on the climbing route.
この地形は洪水が起きやすい特徴がある。
This terrain has characteristics that make flooding likely.