Unfortunately, the real world is rife with exceptions and edge cases - duck-billed platypuses are furry and lay eggs.
不幸的是，真实的世界总是充满了例外和极端情况—鸭嘴兽既有皮毛，又通过产卵繁殖后代。
2
These dinosaurs were the forerunners of the bigger and more spectacular ornithischians like stegosaurus, ankylosaurus and the duck-billed dinosaurs.
这些恐龙都是更大更壮的鸟臀目恐龙，例如剑龙、甲龙和鸭嘴龙的先祖。
3
Scientists point out that the it is very difficult for these duck-billed dinosaur fossil bones to move to more younger strata as of the fracture formation.