bullpen
/ˈbʊlpen/noun
1- chiefly N. Amer. an enclosure for bulls〈主北美〉牛栏。
1.1
- an exercise area for baseball pitchers（棒球）投手练习区。
1.2
- the relief pitchers of a baseball team（棒球队的）候补投手。
1.3
- an open-plan office area敞开式办公区。
1.4
- a large cell in which prisoners are held before a court hearing（关押候审者的）大囚室。