Sent_en: 2zh To compare against a second large species, Burda and his team analyzed data on 2,974 deer studied through photography, direct observation, and snow imprints.
Sent_yy: 为了与第二个大物种进行比较，布尔达和他的团队分析了2974只鹿的数据，这些数据是通过摄影、直接观察和采集雪印来收集的。