the end of a race in which the leading runners or horses are so close together that only a photograph of them passing the finishing line can show which is the winner 摄影定名次（竞赛成绩十分接近，以终点线摄影决定结果） It was a photo finish, with three horses neck and neck at the finishing line. 3 匹赛马几乎同时到达终点，只有通过看录像来定名次。 The race ended in a photo finish. 赛跑以几乎平分秋色的结果告终。