The young Doedicurus is so much smaller. 巨犰狳幼崽小得多
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
...adaptations that protect them and their young 这些适应性可以保护它们及幼崽
Their young are born fully formed... 幼崽一出生就完全成型
They can feed their young whenever they choose, 它们可以随时喂养幼崽
As usual, this female must tend to her hungry young... 如往常一样 这只母龙必须照顾自己饥饿的幼崽
But young mammals aren't entirely helpless. 但是哺乳动物幼崽并非完全无助