evaporation  
noun [ U ] uk/ɪˌvæp.əˈreɪ.ʃən/ us/ɪˌvæp.əˈreɪ.ʃən/
  (BECOMING GAS)      
  蒸发
the process of a liquid changing to a gas, especially by heating
  Ice cover prevents evaporation of water from the lake surface. 冰层防止水从湖面上蒸发。 
 Fruit juice is concentrated through evaporation. 果汁通过蒸发而被浓缩。 
 - More examples
 - The salt deposits were formed by the evaporation of ancient seas millions of years ago.
 - Using a hand mister to wet your plants will cut down on water loss from evaporation.
 - The evaporation of sweat lowers the body temperature.
 
  (DISAPPEARANCE)      
 消失;消散
the fact of something disappearing
  As a boy, he was aware of the evaporation of his grandfather's life savings.  他小时候就意识到祖父毕生积蓄的消失。 
 Political events caused an evaporation of confidence in the nation’s currency. 政治事件导致人们对该国货币失去了信心。 
 - More examples
 - Political events caused an evaporation of confidence in the nation’s currency.
 - He faced the evaporation of his political ambitions.
 - People were angry and fearful about the evaporation of civil society.
 
See: evaporate