reservoir
/ˈrezəvwɑː(r)/noun
1- a large natural or artificial lake used as a source of water supply水库。
1.1
- a supply or source of something储藏, 贮备：
Scotland has always had a fine reservoir of comic talent.
苏格兰一直是喜剧天才的宝库。
1.2
- usu. with modifier a place where fluid collects, especially in rock strata or in the body蓄水池; （岩层中的）贮水层; （体内的）储液囊。
1.3
- a receptacle or part of a machine designed to hold fluid贮液器。
1.4
- Medicine a population, tissue, etc. which is chronically infested with the causative agent of a disease and can act as a source of further infection【医】（病原体的）储存宿主, 储主, 储源。
词源
mid 17th cent.: from French réservoir, from réserver 'to reserve, keep'.