n.

1. 逆流水；坝的回水
2. 落后闭塞的地方；与世隔绝的地方
   For years they lived in the backwater of the country.

   他们在这国家的落后地区住了多年。

n.

1. a part of a river not reached by the current, where the water is stagnant.
2. a place or state in which no development or progress is taking place.