straight river是什么意思

用法例句

The flow characteristics of the straight chanel up the bend were studied by means of the advanced three-dimensional acoustics Doppler current meter.

采用三维声学多普勒流速仪对弯道上游顺直河段水流特性进行了系统的试验研究,全面分析了水流的三维时均流速及流场和纵向紊动强度。