Laddershaped weir是什么意思

用法例句

Flow measurement improvement of cipoletti weir in irrigation areas;

灌区梯形量水堰测流改进研究

Benefits of eight types of plant compound on the terrace barrier in the rocky mountain area were investigated.

对青石山区梯田地堰 8种植物配置模式的效益进行了调查 ,结果表明 :各参试模式的纯收入与年投资收益率均高于对照 ;不同的配置模式纯收益不同 ,其中以香椿、核桃投资收益率最高 ;在主栽树种密度相同的情况下 ,立体栽植效益好于单一树种 ;前期适度密植可提高单位地堰效