“卵石”用英语怎么说

水流过卵石，汩汩作响。The water burbled over gravel.这只鸟错把卵石当蛋,想去孵它.The bird mistook the pebble for egg and tried to hatch it.我朝母鸡扔卵石，吓得它们乱跳乱叫。I threw pebbles at the hens, and that made them jump and squawk....