The bulldozers piled up huge mounds of dirt...推土机堆起一堆一堆的泥土。Mounds of oyster shells surround the weathered shacks.成堆的牡蛎壳包围着这些久经风吹日晒的木板棚屋.Australian moundbird; incubates eggs naturally in sandy mounds.澳大利亚冢雉; 通常在沙堆中孵蛋.The ...