By-passed by most of their enriching flow of exchange, they have become cultural and economic backwaters. 所通過的大部分充實流動交換，他們已經成為文化和經濟落後 希望能到你
1.to flow backwards 2.backflow; backwash; backwater; counter-flow
... breathe, fortunately the frog in neighbor, pushes him in the backwater, has saved him. The small fish finally understood...