The gullies may have been carved by liquid water millions of years ago , when mars was warmer and wetter .
这些水沟可能是几百万年前由液态水冲刷而成,那个时候的火星要比现在更加温暖和湿润。
The statistics suggest that the eastern united states may be getting wetter as the arid west dries out further .
统计数据表明美国东部或许会越来越潮湿,而原本干燥的西部也会更加干燥。
Others are political ; the pumps and aqueducts that carry water from the wetter north to the dry fields in the south are creaking with age , threatening ecosystems and endangering species .
Radical thinkers favour sending " virtual water " from wetter parts of the basin to drier parts , in the form of grain and other food .
激进的主张则倾向于将“虚拟水”以谷类及其他粮食作物的形式从湿润地带输送至干燥地区。
Chen notes that the work also supports the suggestion that early mars had a wetter climate than it does today and thus might have supported life .
陈品指出,该研究也支持这个说法:火星早期的气候比当今更湿润,因而也可能适于生命的存在。
Colds are more common in the fall and winter because the cooler , wetter weather drives people inside , and viruses can more easily jump from one person to the next .