water reservoirs
oil reservoirs
reservoir of knowledge
natural reservoirs
A: How does the city get its drinking water?
A：这座城市是如何获得饮用水的？
B: They use water from several reservoirs nearby.
B：他们使用附近几个水库的水。
1) 水库或蓄水池
2) 资源或物质的储备
3) 知识或信息的宝库
1. 水库；蓄水池
2. 储备（资源、知识等）
noun
1. a large natural or artificial lake used as a source of water supply.
2. a supply or source of something.
Synonym: supply, storage, store