The old male is tracking a herd. 年老的公豹在追踪一群山羊
is a key mammalian trait. 是哺乳动物的一项重要特征
The leopard is very old, 雪豹年纪很大了
The young Doedicurus is so much smaller. 巨犰狳幼崽小得多
But there is one obvious opportunity. 但有一个明显的机会
The giant armadillos' armor is completely impregnable... 巨犰狳的盔甲坚不可摧
For the young Doedicurus, the only option is to stay put. 对巨犰狳幼崽来说 唯一的选择是保持原地不动
is also a mammal... 也是哺乳动物
The calf is safe once more... 幼崽又安全了
but the calf is tiring. 但幼崽逐渐疲惫