white elephant
US /waɪt ˈɛl.ə.fənt/
UK /waɪt ˈɛl.ə.fənt/

1.
白象, 累赘, 昂贵而无用的东西
a possession that is useless or troublesome, especially one that is expensive to maintain or difficult to dispose of
:
•
The old factory became a white elephant for the city, costing millions in upkeep.
那座旧工厂成了城市的累赘,维护费用高达数百万。
•
Buying that huge mansion turned out to be a real white elephant.
购买那座巨大的豪宅结果成了一个真正的累赘。