aqua  
 noun [ U ] uk/ˈæk.wə/ us/ˈɑː.kwə/
  (COLOUR)      
  水绿色;浅绿色
a greenish-blue colour
  His jet is painted in aqua and features a picture of a dolphin on the tail.
 - More examples
 - Vibrant colors like aqua brighten brown eyes.
 - The earrings come in black, pink, aqua or white.
 - metal serving trays (13") in canary, plum, palm, orange, orchid, fuchsia or aqua
 
  (WATER)      
 chemistry UK specialized (用于化妆、美容产品中的)水,水溶液,水剂
water, when it is used in make-up and beauty products
  Shampoo, shaving foam, and toothpaste all contain aqua (water), laureth sodium sulfate, and a whole list of other near-identical ingredients. 
 aqua       
adjective uk/ˈæk.wə/ us/ˈɑː.kwə/
 水绿色的;浅绿色的
of a greenish-blue colour
  Mrs Bush wore an aqua dress by Oscar de la Renta.
 - More examples
 - A little blue ship appears on top of aqua waves.
 - They modelled dresses in fluid aqua jersey.
 - a guy in an aqua blue suit
 - The boxes are purple, aqua and pink.