They would circulate water and air through the farm and back again for people to use.

这样一来，人们就能够使用由农场回收后净化得来的水和空气了。

youdao

15 hr 50 min the primary loop's pumps are turned on, which circulate water around the core.

15小时50分钟随着主回路的水泵启动，循环水包围了堆芯。

youdao

Most landscape fountains and waterfalls are closed system types that re-circulate water with an electric pump.

大多数景观喷泉，瀑布是封闭的系统类型，重新分发水电动泵。

youdao

Japanese broadcaster NHK said Tepco was now studying a plan to circulate water from the basement through a decontamination filter and back into the reactor.

BBC: Japan nuclear: Tepco halts Fukushima cooling plan

The tsunami destroyed the diesel generators that provide power to drive the pumps that circulate the water coolant through the reactor that removes decay heat.

FORBES: Explainer: What Caused The Incident At Fukushima-Daiichi