zhè gè / xiàng mù / jiù xiàng / yī gè / wú dǐ dòng / tóu rù / zài duō / qián / dōu / bù gòu

这个项目就像一个无底洞，投入再多钱都不够。

This project is like a bottomless pit; no matter how much money you put in, it's never enough.