fish ladder
n.
A series of artificial pools arranged like ascending steps, enabling migrating fish to swim upstream around a dam or other obstruction.
fish ladderfish ladder at Rocky Reach Dam on the Columbia River, near Wenatchee, Washington
| 单词 | fish ladder |
| 释义 | fish ladder n. A series of artificial pools arranged like ascending steps, enabling migrating fish to swim upstream around a dam or other obstruction. fish ladderfish ladder at Rocky Reach Dam on the Columbia River, near Wenatchee, Washington |
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