flow upstream 意味

• 逆流する
  

例文

1. as soon as the van of the sogo force crossed the river , the chosokabe force broke the dam , which they already had built to stop the flow upstream .
   十河側の先鋒が川を渡り始めるや長宗我部勢はあらかじめ上流の川をせき止めておいた堰を切った。