Compared with other apes , humans are " altricial , " which is to say immature at birth .

相比于其他猿类，人类属于“晚熟”类的生物，就这就是我们一出生就是不成熟的。

Artificial incubation applied to small numbers of altricial bird eggs .

人工孵化应用于鸟蛋。