A beach is a beach, and a pool is a pool.

沙滩就是沙滩，泳池就是泳池。

youdao

Was there a pool at the hotel?

饭店里有游泳池吗？

《牛津词典》

Does the hotel have a pool?

这家旅馆有没有游泳池？

《牛津词典》

It made the ice thin. If he stepped there, he might break through the ice into a pool of water.

VOA: special.2010.05.01

It reminds me of a joke about the statistician who drowned in a pool with an average height of 10 inches.

这让我想起一个统计学笑话,在一个平均水深为10英寸的游泳池里，谁会被淹死。

哈佛公开课 - 幸福课课程节选

And so suddenly, you are thrown into a pool of so many other incredibly intelligent, driven people, and

所以，突然之间，你发现周围人都是绝顶聪明，都是劲头十足的人，

我遇到的天才们 - SpeakingMax英语口语达人

No team has ever gone on to win the tournament having lost a pool stage match.

BBC: Boks defeat still hurts - Vickery

But then it swept over a pool of unusually warm water in the Gulf of Mexico.

BBC: Climate chaos: Transcript

The exhibitors are 20 artists chosen from a pool of over 700 applicants from 53 countries.

ECONOMIST: Debating what to covet with unlimited funds