1. The so-called "space tourism" program turned out to be a moondoggle that wasted billions of dollars.

这个所谓的“太空旅游”项目最终成为了一个浪费数十亿美元的费力而无效的计划。

2. The government's investment in that high-speed rail project was criticized as a moondoggle, as it had little practical value and drained public funds.

政府对那个高铁项目的投资被批评为一种浪费，因为它几乎没有实际价值，但却消耗了公共资金。