Cycle water should be fresh and there is no sediment in the tube.

必须确保循环水必须是清洁的，而且管子中没有沉积物。

youdao

The input of relatively light freshwater also alters circulation patterns that cycle water between Greenland and northern North America, which could lead to more water on the North American end.

体积相对轻的淡水流入海洋后，还会改变格林兰岛和北美洲北部之间的洋流循环模式，这种情况最终可能导致更多的海水淹没北美大陆。

youdao

You know, I am still not too clear about the hydrologic cycle, the transfer of water back and forth between the earth and the atmosphere.

你知道，我仍然不是很清楚水文循环，也就是水在地球和大气之间的来回转移。

youdao

But they can also disrupt the delicate water cycle that provides food,recreation and hydration to communities.

VOA: standard.2010.08.04

Galmudug regional government Minister of Planning Omar Mohamud warns that not implementing a long-term solution to the water problem will fuel the vicious cycle of droughts, hunger,and violence and keep the Somali people in the iron grip of poverty.

VOA: standard.2009.10.06

From source to sea and through the never ending water cycle, water connects all corners of planet Earth.

UNESCO: MEDIA SERVICES

The manual features the topics of water cycle, water resources and challenges, population growth impacts, climate change impacts, water conservation practices and practical exercises for 1st to 10th grade students.

UNESCO: OFFICE IN AMMAN

At the global level, The Ramsar Convention has called for local to national governments to recognise wetlands as the primary sources from which humans derive water and that they are a major and critical component of the water cycle that keeps us supplied with water.

UNESCO: MEDIA SERVICES