boondoggle

1. N-COUNT People sometimes refer to an official organization or activity as a boondoggle when they think it wastes a lot of time and money and does not achieve much. (劳民伤财的)无用物[美国英语] [非正式]

The new runway is a billion-dollar boondoggle. 这条新跑道是一个价值十亿美元的废物。