At the city of Coba the Maya built dikes around a lake in order to raise its level and make their water supply more reliable.

在科巴市，玛雅人围绕着一个湖泊修建堤坝，以提高水位，使供水更加稳定可靠。

youdao

First, it is increasingly difficult to raise the current level of food production owing to a potential impact of farmland, water resources, climate and other related factors.

首先，它是越来越困难，提高粮食生产水平由于潜在影响的耕地，水资源，气候及其他相关因素。

youdao

Our scientists generally think that global warming will cause a melting of the icecaps and that will raise the water level and so on and so forth, but that might not be the worst thing that happens.

BBC: News | Back to the future | John Mohawk

This is the first high-level UN event dedicated to the issue of water and disasters, and it seeks to raise awareness, share best practices and experiences, and discuss future global actions on water and disasters.

UNESCO: MEDIA SERVICES