轻而易举地

like water off a duck's back Like water off (on) a duck's back swim like a duck like a dying duck in a thunderstorm like a duck in a thunderstorm knee-high to a duck to run like a redshank like a fish out of water like a red rag to a bull talk to sb. like a Dutch uncle like water like water off a duck's back like a duck in a thunderstorm knee-high to a duck like a fish out of water talk to sb like a Dutch uncle talk to sb. like a Dutch uncle a dead duck duck hepatitis A virus a sitting duck a ditch to carry extra irrigation water mating like to like