the natural slope of a hill, e.g. one used for skiing, straight down from top to bottom
in geography, a boundary between a higher region and a plain. Rapids and waterfalls often occur at the point where a river crosses this line
| 单词 | fall line |
| 释义 | fall linenounthe natural slope of a hill, e.g. one used for skiing, straight down from top to bottom in geography, a boundary between a higher region and a plain. Rapids and waterfalls often occur at the point where a river crosses this line |
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