amphibious          
adjective uk/æmˈfɪb.i.əs/ us/æmˈfɪb.i.əs/
 (动物)水陆两栖的
of or relating to a type of animal that lives both on land and in water
  amphibious animals 两栖动物 
  水陆两用的
relating to vehicles that operate both on land and in water
  amphibious vehicles/aircraft 水陆两用车辆/飞机 
 an amphibious landing/attack (= from the sea onto the land) 两栖登陆/进攻