yán / jiū / rén / yuán / zài / huà / shí / zhōng / fā / xiàn / le / chí / lóng / kē / kǒng / lóng / de / zú / jì研究人员在化石中发现了驰龙科恐龙的足迹。Researchers found the footprints of a dromaeosaurid dinosaur among the fossils.