held retention water

例句：

1. 1. Thereservoir holds back water during the dry season.
   水库在干旱季节储存水分。
2. 2. The farmershave to hold back water from the riverto prevent flooding.
   农民们不得不从河流中截留水分以防止洪水。
3. 3. The rainheld back the drought for a while.
   雨水暂时缓解了旱情。