复数： childhoods

It may also be related to childhood .

它也有可能跟童年有关。

Through hard work and opportunities , nina 's childhood dream came true !

通过自己的努力和各种机遇，尼娜儿时的梦想成真了！

Exposure to lead in childhood has been linked to aggression and criminal behaviour in adults .

童年时期的铅暴露被认为会导致成年后的攻击性和犯罪行为。

I heard this story many times during my childhood .

孩提时代，这个故事我听了许多次。

The longer the childhood the more males evolve toward caring for their offspring .

子代幼年时期越长雄性倾向于朝着关注子代养育的方向进化。