white elephant

US /waɪt ˈɛl.ə.fənt/
UK /waɪt ˈɛl.ə.fənt/
"white elephant" picture
1.

白象, 累贅, 昂貴而無用的東西

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.
那座舊工廠成了城市的累贅,維護費用高達數百萬。
Buying that huge mansion turned out to be a real white elephant.
購買那座巨大的豪宅結果成了一個真正的累贅