river reach

• 河段,河区

river reach的用法和样例：

例句

1. You rarely see boats on this stretch of the river.
   这一河段船只罕见。
2. In the experiment,the water quality of Panlongjiang River was monitored by using Tradescantia.
   用紫露草雄蕊毛突变技术对盘龙江松花坝至滇池河段的水质进行监测。