излишек чего-л. над чем-л.
• The excess of evaporation over precipitation has to be made up by underground drainage from the less arid areas that supply the water.
Источник:
Русско-английский научно-технический словарь
на Gufo.me
• The excess of evaporation over precipitation has to be made up by underground drainage from the less arid areas that supply the water.