I feel soft, like a pool of stagnant water, collapsed on the bed.

我感觉自己软的像是一滩死水，瘫倒在床上。

youdao

If there are no institutions in the market, the index will be like a deep pool of stagnant water.

股市中如果没有机构，股指就是一潭死水。

youdao

Over the last few years Wall Street has poured billions into film financing, creating a glut of new releases competing for a stagnant pool of moviegoers.

FORBES: Magazine Article

It is, of course, a long way from the laboratory bench to the stagnant pool, and many questions remain.

ECONOMIST: Recruiting mosquitoes to fight malaria