fish-ladder鱼梯
vane fish ladder折流板式鱼道
notch fish ladder凹槽式鱼梯
open fish ladder开敞式鱼梯
Ladder fish鱼梯
N（名词） a row of ascending pools or weirs connected by short falls to allow fish to pass barrages or dams (使鱼类游过障碍或水坝而建造的)鱼梯